=Paper= {{Paper |id=None |storemode=property |title=Defining Software Ecosystems: A Survey of Software Platforms and Business Network Governance |pdfUrl=https://ceur-ws.org/Vol-879/paper4.pdf |volume=Vol-879 |dblpUrl=https://dblp.org/rec/conf/icsob/JansenC12 }} ==Defining Software Ecosystems: A Survey of Software Platforms and Business Network Governance == https://ceur-ws.org/Vol-879/paper4.pdf
                     Defining Software Ecosystems: A Survey of
                     Software Platforms and Business Network
                                    Governance

                                       Slinger Jansen1,2 and Michael Cusumano2
                                   1
                                    Utrecht University, Utrecht, the Netherlands,
                                               Slinger.jansen@uu.nl,
                         2
                           Massachusetts Institute of Technology, Cambridge, Massachusetts,
                                           {Slinger,Cusumano}@mit.edu


                        Abstract. Currently, there is little understanding about how different
                        types of software ecosystems must be governed for the preservation and
                        improvement of ecosystem health. This paper explores the definition
                        of software ecosystems and provides a classification model for software
                        ecosystems. The classification model is applied to 19 cases previously
                        explored in software ecosystem literature, and governance tools are ob-
                        served for the different types of ecosystems. The governance tools are
                        summarized in a governance model that, when used correctly, serves
                        ecosystem coordinators in determining strategies to maintain and ulti-
                        mately improve software ecosystem health.



                1 Introduction

                While in the early days of software engineering a software product was the re-
                sult of effort of an independent software vendor to create a monolithic product,
                modern software strongly relies on components and infrastructure from third
                party vendors or open source suppliers [11, 36, 10]. The relationships between
                software development firms and service companies shaped the product software
                landscape into software ecosystems, where suppliers and buyers of software prod-
                ucts, components and technologies collaboratively create competitive value. One
                could state that the success of a product software company therefore no longer
                depends only on its own development quality but also on the way it manages its
                relationships [16, 22, 15]. Software differs from physical goods in several ways.
                Software has no physical limitation, therefore the main limitations are concep-
                tual, social and economical [5, 31]. No other business has a gross profit margin of
                99 percent on sold products [11]. In other words, reproduction costs for software
                products are next to zero.
                    Just as participants in a value chain of physical products, partners in a soft-
                ware value chain maintain ongoing business relationships. Up to the late 80s,
                vertically integrated companies delivered complete system stacks [11]. These
                stacks contained everything needed to serve a customer; hardware and soft-
                ware; operating system and applications. In the late 80s and beginning of the




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                90s the horizontal layer structure of solution stacks changed into more modu-
                lar clusters [23]. The ‘software stack’ is now split up in activity layers that are
                complimentary to each other [16, 17] through interfaces and middleware. Be-
                cause of this market structure, it is not uncommon that two software producing
                organizations may collaborate on one activity level and be in competition on
                another.
                    At the highest level of abstraction, software ecosystems are collections of
                organizations that are related through software or a software related concept.
                Please also note that software ecosystems are subsets of business ecosystems.
                If we were to take all organizations in the world and define queries on it to
                create specific collections of organizations, we could for instance use the query
                “Toyota”. This would provide us with all the suppliers, partners, customers, and
                resellers that do business with Toyata and their relationships. The collection
                of organizations and relations gives us access to the business ecosystem of this
                particular company, i.e., the Toyota ecosystem. The same can be done for soft-
                ware concepts, to get the software scope instead of the generic business scope.
                A non-exhaustive list of software concepts is provided with examples:
                – Standards - XML, BPM, OSGi, J2EE, Corba, SEPA, etc.
                – Products - OpenOffice, Microsoft Word, SAP BusinessOne, Grand Theft
                  Auto, etc.
                – Hardware - Playstation 3, HTC Diamond, PDAs, BMW 5 series, etc.
                – Platforms - .Net, Facebook, Android, OS X, etc.
                    The list can be used to identify types of ecosystems (again, non-exhaustive)
                and to name specific instances, such as the “OS X Ecosystem”. Several notes
                must be made with this list. The first issue concerns inclusion and exclusion
                criteria or, put differently: at what point does a collection of organizations and
                relations become a business ecosystem instead of a software ecosystem. The
                answer to this question can be made complex, but it can be simplified by deter-
                mining the aim of the research or “query” that is done within a specific business
                ecosystem. If the query is not specifically software related (‘What companies use
                SEPA for all their business transactions and how are these companies related?’)
                the resulting set is a business ecosystem. If the query is software related (‘What
                software providers have already adopted SEPA as the main language for their
                APIs and how do these organizations relate to each other?’) the resulting set
                can be used to compose a software ecosystem.
                    A second issue with software ecosystems is the type of participant. In a
                commercial ecosystem participants are easy to determine: they are typically or-
                ganizations that aim to survive and thrive, whether it is a one-man company
                or a large ecosystem orchestrator, such as SAP, Microsoft, or Facebook. In the
                scope of open source ecosystems participants can range from foundations (e.g.,
                the Eclipse Foundation), to commercial organizations (e.g., RedHat), to inde-
                pendent developers (e.g., David Heinemeier Hanson for the Rails ecosystem).
                The question on what constitutes a participant in a software ecosystem depends
                on the following criteria: is it relevant for the research question, is it contributing




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                to the ecosystem in a meaningful (but not necessarily significant) way, and is
                the contribution software related?
                    One question that is often asked is whether customers are part of the software
                ecosystem. If we draw the analogy to biological ecosystems, customers are the
                ‘plankton’ that keep the ecosystem alive and well, which by definition includes
                them into the ecosystem. A smart query can be created, however, that excludes
                customers altogether, such ‘what organizations build Apps for Android and how
                are they related to each other?’ The extended answer to the question if customers
                are part of the ecosystem thus is: it depends on the query. The term ‘plankton’
                in this context is highly appropriate: without a (potential) market of sufficient
                size it is risky for third-parties to join or co-create an ecosystem.
                    The second challenge that is handled in this work is the definition of a series
                of governance tools for platform leaders, i.e., parties that can determine the
                future of the ecosystem. Software ecosystem governance is defined as procedures
                and processes by which a company controls, changes or maintains its current
                and future position in a software ecosystem [1]. With this governance model
                platform leaders can determine whether they are using the right methods for
                their ecosystem governance to reach their strategic goals.
                    This paper continues with a description of the survey research in Section 2.
                In Section 3 several terms related to software ecosystems, such as biological,
                digital, and business ecosystems are discussed and contrasted against software
                ecosystems to provide perspectives on the definition of software ecosystems. Sec-
                tion 4 provides the table with the survey results of this work and a classification
                model is extracted to classify and categorize software ecosystems by their defin-
                ing characteristics. Four types of ecosystems are further studied in Section 5,
                where different governance tools are identified through the survey of ecosystems
                and summarized in the software ecosystem governance model for health preser-
                vation and improvement, after we finalize with a short discussion and conclusion
                in Section 6.


                2 Research Approach
                The main research question of this research is whether there exist common types
                of software ecosystems and whether these ecosystems have similar factors in the
                domain of governance, such as life threats, growth challenges, who is in control,
                etc. To identify and select software ecosystems, two criteria were used: first the
                definition of software ecosystems was followed closely, and if an ecosystem did
                not adhere to this definition, it was not selected. Secondly, the ecosystems were
                selected from papers as described in common software ecosystem literature [4],
                to make sure that these ecosystems have also been identified by others as being
                relevant software ecosystems.
                    The survey was stopped at the current number, because of time constraints
                and for the sake of brevity. We therefore do not claim completeness: the contri-
                bution of this work lies in the first classification of software ecosystems and in
                the identification of common concerns for the governance of these ecosystems.




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                For each ecosystem a list of 16 questions was answered by performing docu-
                ment and web site study. Each of the ecosystems was checked by at least one
                other researcher for correctness. These sixteen questions were extracted from
                the work on open software enterprises [27] and the work on software ecosystem
                governance [1]. Based on the answers found for each of the surveyed software
                ecosystems, statements were identified that enable someone to swiftly classify a
                software ecosystem.


                3 Background
                In this section the comparison with other kinds of ecosystems is made. We start
                with the comparison with biological ecosystems and then move to the super-
                categories of ecosystems that can contain software ecosystems: business ecosys-
                tems and digital ecosystems. We finalize with a definition of software ecosystems.

                3.1 Biological Ecosystems

                Considering the software ecosystems domain “borrows” part of its name from
                the domain of (biological) ecosystems, there are some relationships between the
                two, as others have established [14, 21]. Iansiti and Levien highlight the example
                of the jaguar, which is known to eat up to 85 species, thereby controlling large
                parts of the ecosystem, even though the elegant and nimble jaguar only takes up
                a minute part of the ecosystem in total body mass. This could be compared to a
                platform leader like Microsoft, which, although seemingly large with its 100,000
                employees, only is a minute part (less than 1%) of the ecosystem in terms of
                developers and revenues.
                    Dhungana et al. [14] go quite far in their comparison. In short, they equate
                software and natural ecosystems on the following issues. First, both types of
                ecosystems have a finite reservoir of resources. Secondly, participants in both
                ecosystems will be included or forced out by changes in the dynamics in the
                ecosystem. Thirdly, collaboration and competition occur in both types of ecosys-
                tems. Finally, there are life cycles in both ecosystems (product versus organism).
                    The comparison to biological and natural ecosystem is easily made, but analo-
                gies only stretch so far. The main difference between software and natural ecosys-
                tems is that biological ecosystems are mainly studied to observe influences from
                external factors, whereas software ecosystem dynamics are analysed mainly with
                the aim of growth and success. Software ecosystems are also made up of par-
                ticipants harboring intentionality, whereas the beings in a biological ecosystem
                have no means to consciously be part of the ecosystem. The largest difference
                between participants in software ecosystems and those in natural ecosystems,
                however, is that in software ecosystems participants can consciously decide to
                exit the ecosystem or even destroy it.




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                3.2 Business Ecosystems

                Software ecosystems are perhaps a new concept, but business ecosystems have
                been around much longer. Since the 90s, James F. Moore has used the concept
                in multiple outlets, but most famously in his book entitled “The Death of Com-
                petition” [33]. Moore defines business ecosystems as an economic community
                supported by a foundation of interacting organizations and individuals: the or-
                ganisms of the business world. The economic community produces goods and
                services of value to customers, who are themselves members of the ecosystem.
                The member organisms also include suppliers, lead producers, competitors, and
                other stakeholders. Over time, they coevolve their capabilities and roles in sup-
                ply chains, and tend to align themselves with the directions set by one or more
                central companies. Those companies holding leadership roles may change over
                time, but the function of ecosystem leader is valued by the community because
                it enables members to move toward shared visions to align their investments,
                and to find mutually supportive roles [32].
                    It must be noted that the concept has primarily found ground in the tech-
                nical community. Furthermore, Moore is already referring here to “central com-
                panies”, a concept that is later reformulated to “platform leaders” by Cumano
                and Gawer [19]. It is commonly found that using business ecosystems to quickly
                develop, prototype, and release new products has a positive influence on inno-
                vation, since it is much quicker than more traditional “in-house only” product
                development processes [12].
                    The notion of platform leaders quickly leads to the typical three roles that
                are mentioned in contexts of business ecosystems: platform leaders, niche play-
                ers, and bridge players. platform leaders are typically orchestrators that largely
                determine the growth of an ecosystem. A specific type of platform leader is the
                dominator, a platform leader that quickly swallows up large parts of the ecosys-
                tem, such as IBM did in the 80s, and more recently Twitter, that, by doing a
                number of strategic acquisitions, made new entrants into the Twitter ecosys-
                tem reluctant to join. The niche players are those parties that use technology
                from the platform leaders to approach certain niche markets and are typically
                smaller, but still highly successful. An example of a niche player in a software
                ecosystem is for instance a provider of technical drawing software for heating in
                buildings, built on top of AutoCAD. The adagium ‘get big, get niche, or get out’
                is a popular rewording of the platform leader-niche player phenomenon. Finally,
                the bridge player is a player that bridges certain ecosystems. An example of
                such a player in a number of software ecosystems is PhoneGap, a platform that
                enables the release of software applications in different mobile ecosystems with
                one version of the software code.
                    Software ecosystems have been the subject of much debate before the concept
                was defined formally. They have always been seen as yet-another-instance of
                business ecosystems and have been studied in that way with much merit [20,
                34, 30]. In the previous section it has been explained that software, however, is
                different and therefore deserves its own subcategory under business ecosystems.




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                3.3 Digital Ecosystems

                A digital ecosystem is defined as a distributed adaptive open socio-technical sys-
                tem with properties of self-organisation, scalability and sustainability [9]. The
                field of digital ecosystems is rapidly evolving. Previously, digital ecosystems were
                described to be a form of evolution from traditional monolithic and service-
                oriented architectures towards collaborative architectures in which autonomous
                agents, orchestration, and service choreography are the main topics addressed.
                Increasingly, however, the term digital ecosystem is being used in policy and re-
                search to describe digital business ecosystems. For sake of simplicity, we consider
                software ecosystems subsets of digital ecosystems.

                3.4 Software Ecosystems

                Several scholars conducted in-depth studies to explain ties between companies
                in software ecosystems. These studies range from strategic level [17, 15, 8, 22]
                through operational level [28] down to the technical level [26, 25]. Scope changes
                of the interpretations of software ecosystems result in differing definitions as well.
                At present several different definitions exist of the term software ecosystems.
                – Kittlaus and Clough [29] define a “software ecosystem as an informal network
                  of (legally independent) units that have a positive influence on the economic
                  success of a software product and benefit from it”.
                – Bosch [7] defines a software ecosystem as “consisting of the set of software
                  solutions that enable, support, and automate the activities and transactions by
                  the actors in the associated social or business ecosystems and the organizations
                  that provide these solutions”.
                    Three shared concepts stand out in these definitions: (1) actors, organizations
                and businesses, (2) networks and social or business ecosystems, and (3) software.
                Based on these shared concepts Jansen, Finkelstein, and Brinkkemper [24] con-
                structed the definition that is used throughout this article:

                    A software ecosystem is a set of actors functioning as a unit and in-
                    teracting with a shared market for software and services, together with
                    the relationships among them. These relationships are frequently un-
                    derpinned by a common technological platform or market and operate
                    through the exchange of information, resources and artifacts.

                   Software ecosystems are usually governed and steered by one or more coor-
                dinating parties who profit when the ecosystem thrives. Typically, these coor-
                dinators also control the ‘underpinning technology’ on which the ecosystem is
                based, such as a commercial company that builds a software platform. There
                are also less traditional ecosystem coordinators, however, such as consortia be-
                hind open source platforms or even single developers who may have influence on
                the ecosystem. Software ecosystem coordinators are defined as beneficiaries of




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                software ecosystem growth who have instruments available to influence the de-
                velopment of the platform or the surrounding ecosystem. Typically they are also
                (partly) responsible for the further development of the underpinning technology.
                    The role of software platforms in software ecosystems is undeniable. If
                an ecosystem is to be formed around anything, the controlling entity needs to
                allow a degree of freedom for value creation of which the controlling entity re-
                ceives only a small part [18, 19]. As Iansiti and Levine [21] articulate: “Out-
                side complementors will be attracted to the platform if there is option value
                in the complements, provided the platform owner does not expropriate all the
                value they create.” In this paper we use the platform definition of Gawer and
                Cusumano [19]: “A foundation technology or set of components used beyond a
                single firm and that brings multiple parties together for a common purpose or
                to solve a common problem”. Furthermore, Gawer and Cusumano state that
                the value of the platform increases exponentially with (a) more complementary
                products and services, and (b) more users.


                4 Survey and Classification Model

                In table 4 the software ecosystems that were studied for this work are listed, along
                with the four classification factors. The classification factors were extracted from
                sixteen properties that were extracted from the work by Baars and Jansen [1]
                and the work on the Open Software Enterprise [27]. The sixteen properties were
                left out for reasons of brevity, however, factors were included such as a detailed
                description, the underlying base technology, the population, a typical example
                within the ecosystem, and the estimated size of the ecosystem in terms of number
                of platform extenders1 .
                    Typology and classification models have been created for business ecosys-
                tems. The model of Boons and Baas [6], for instance, identifies product life
                cycle, material life cycle, geographical area, sectoral, and miscellaneous ecosys-
                tems. Our classification, however, specifically looks at four factors, being:
                    Base Technology - The definition of a software ecosystem suggests that in
                general there will be some technology underpinning the ecosystem. The survey
                in this paper suggests that all software ecosystems are underpinned by a tech-
                nology. The types of technology found here are a software platform, a software
                service platform, and a software standard. Most software ecosystems in the sur-
                vey are underpinned by one software platform, such as AutoCAD, Ubuntu, or
                Wordpress. Some software ecosystems are even underpinned by multiple soft-
                ware platforms, such as the Microsoft ISV ecosystem, which is underpinned by
                Microsoft CRM, Sharepoint, Exchange, and many other underlying platforms.
                The third type of base technology for software ecosystems is a software service
                platform, where an online service is provided around which other ecosystem par-
                ticipants can gather, such as the Force.com platform and the HubSpot platform,
                 1
                     The full survey can be found here:
                     http://www.softwareecosystems.org/empirical/governancesurvey/




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                Table 1. Ecosystems Under Study and their Classification according to the Ecosystem
                Classification Model
                 Name                 Underpinning Coordinators Extension market                       Accessi-
                                     technology                                                       bility
                 AutoCAD plug-ins    platform         privately owned a list of extensions            paid
                 Ubuntu              platform         consortium      multiple extension markets      for free
                 Android             platform         privately owned a commercial extension market   screened
                 iOS                 platform         privately owned a commercial extension market   paid
                 Eclipse             platform         consortium      an extension market             screened
                 XBMC                platform         consortium      multiple extension markets      for free
                 Joomla              platform         consortium      a list of extensions            screened
                 GX                  platform         privately owned an extension market             screened
                 Ruby                platform         consortium      multiple extension markets      for free
                 Ogre3D              platform         consortium      a list of extensions            screened
                 MS ISV Partners     platforms        privately owned a commercial extension market   paid
                 Wordpress           service platform consortium      an extension market             screened
                 HubSpot             service platform privately owned a commercial extension market   screened
                 SalesForce          service platform privately owned a commercial extension market   screened
                 Spotify             service platform privately owned an extension market             screened
                 World of Warcraft   service platform privately owned multiple extension markets      for free
                 XBRL                standard         consortium      a list of extensions            paid
                 Open Design All.    standard         consortium      a list of extensions            paid
                 OSGi                standard         consortium      a list of extensions            paid



                which are only available online and cannot be installed individually on a cus-
                tomer’s server. Finally, an ecosystem can be underpinned by a software standard,
                such as the XBRL ecosystem or the Open Design Alliance, which bases most
                of its technology around AutoDesk’s DWG standards. Please note that some
                technologies are based on other technologies and therefore may have an overlap
                with those ecosystems. The case of Joomla, for instance, relies on a database,
                a web server, and an operating system and its participants are all also partic-
                ipant (sometimes unknowingly) in these other ecosystems. Furthermore, please
                also note that we abstract from the technology used for platform extension (i.e.,
                API, service call, plug-ins, apps). For an extensive discussion on extension pat-
                terns the work of Jansen et al. [26] can be used as a starting point.
                    Coordinators - The coordinators of an ecosystem are perhaps the largest
                influence on governance: the owners have full control over the tools and methods
                that are used to increase the success of an ecosystem. A software ecosystem is
                either owned by a community or owned by a private party. An ecosystem that
                is controlled by a community is the Eclipse ecosystem. The Eclipse consortium
                controls the ecosystem and represents the wishes and commands of the consor-
                tium members, ideally. An ecosystem in which the technology is privately owned
                by a commercial party with typical commercial interests, usually exerts more
                control over the ecosystem. An example of a commercially controlled ecosystem
                is the iOS ecosystem, where Apple (the private owner of the underpinning tech-
                nology) for instance determines what types of applications are accepted to the
                application store.
                    Extension Markets - Many of the software ecosystems are centralized
                around a market of extensions, also known as app stores or app markets. A
                software ecosystem can have no extension market, a simple list of extensions, an
                actual extension market, a comercial extension market, and multiple extension




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                markets. When a software ecosystem has no explicit extension market, compo-
                nents may be available through known third-parties. An example of this is the
                AutoCAD ecosystem, where there is a short list of components on the Autodesk
                community site, but there exist many more extensions available only through
                third-parties that do their own marketing. A more mature way of handling ex-
                tensions is a list of extensions. The methods of getting on the list are determined
                by the accessibility of the extension market. An example of the extension list is
                provided on the site of the three dimensional graphics platform Ogre3d, where
                developer contributions to the ecosystem are listed on a simple web page. The
                next level of extension market actually enables parties to distribute and even
                sell their extensions on the market. An example of this is the Firefox Extensions
                market, where third parties can offer their extensions, without having to pay
                the Firefox consortium. A commercial extension market is used by the owner to
                make money, with the obvious examples being the Android App Market and the
                iOS App Stores. Finally, some ecosystems, such as the XMBC and World of War-
                craft ecosystems, have multiple extension markets. In the case of the World of
                Warcraft software ecosystem, the maker of the game did not want to create their
                own add-on store and left it to the market to create solutions for that. Several
                development hubs and add-on markets have been created, such as “curse.com”
                and “wowace.com”.
                    Accessibility - Accessibility to an ecosystem is one of the defining factors
                for an ecosystem: the ability to join an ecosystem and its barriers to entry deter-
                mine what types of participants will play a part in it. For software ecosystems
                three accessibility possibilities have been identified: open source, screened but
                free, and paid. An open source ecosystem is one where it is possible to add
                contributions to a project, create and publish components in the extension mar-
                ket, etc., without any barriers. An example of such an open source ecosystem
                is the Rails ecosystem, where developers can simply add components (gems) to
                the community without anyone performing another check. Typically, however, a
                committee performs some quality control to make sure that a developer’s contri-
                bution is of the right quality, such as with Eclipse Plug-ins and plug-ins for the
                Chrome browser. The most restricted is an ecosystem for which must be paid.
                An example of such an ecosystem is the iOS ecosystem, where a developer must
                pay a small amount before being able to publish applications in the extension
                market of Apple. When combining these four qualifiers the following defining
                sentence results:

                    The [NAME] software ecosystem is based on a {software platform,
                    software service platform, software standard } and is coordinated by a
                    {privately owned entity, community } with {no extension market, a list
                    of extensions, an extension market, a commercial extension market, mul-
                    tiple extension markets} to which participants can submit extensions
                    {for free, after a screening, after making a payment}.

                For example, the Apple iOS software ecosystem is described as follows:




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                    The Apple iOS software ecosystem is based on a software platform and
                    coordinated by a privately owned entity with a commercial extension
                    market to which participants can submit extensions after making a pay-
                    ment.

                    It must be noted that several qualifiers were excluded, but may play a defining
                role in describing a software ecosystem. One of those candidates was stickiness,
                based on the characteristics “network effects”, “switching costs”, and “multi-
                homing”. The main problem with stickiness, i.e., how hard it is for participants
                in an ecosystem to switch to another, is that it can only be defined in continuous
                scales instead of discrete terms as the qualifiers do now. A second qualifier that
                was excluded was entry barriers, which are highly dynamic and can change
                frequently. Another factor that defines an ecosystem that was left out of the
                defining statement is the number of markets that the ecosystem brings together.
                Most software ecosystems concern only two markets, such as AutoCAD users and
                AutoCAD plug-in builders. For other ecosystems, however, this is much more
                complex, such as for a mobile ecosystem in which extension builders, phone users,
                hardware providers, phone service companies and a central platform coordinator
                are brought together in one ecosystem. Finally, the market size has been excluded
                because a considerable (potential) market is considered a prerequisite for any
                software ecosystem.
                    Observation 1: Standards are a special kind of ecosystem. When studying
                the data, some patterns can be discovered. To begin with, standards are an
                interesting foundation for an ecosystem: multi-homing (i.e., the use of multiple
                standards) is always possible, they are generally managed by consortia with paid
                memberships, and standards are usually promoted using showcases as opposed
                to an extension market for software platforms.
                    Observation 2: Market ownership tells the story. Typically, in case a private
                entity manages the platform the ownership of the market lies in the hands of
                that entity. As a consequence, when there are multiple extension markets the
                platform is typically managed by a community (with the exception perhaps, of
                Android, which has multiple extension markets and a commercial one). If the
                extension market is a “commercial” market, i.e., money can be made by selling
                an extension in the market, it is always owned by a private party. When an
                ecosystem has multiple extension markets, they are typically openly accessible
                and do not require a fee up front. When extenders need to pay for an extension
                market to get their extensions in there, switching costs are typically high.
                    Observation 3: Freely accessible ecosystems also allow multi-homing. All
                ecosystems encountered that do not have a paid membership or entry barrier,
                as a logical consequence typically also allow multi-homing.
                    Observation 4: Extension lists have relatively high entry barriers. When an
                ecosystem coordinator manages a list of extensions instead of an extension mar-
                ket, it is typically hard to get onto the list. For most community-managed ecosys-
                tems getting onto the list means the extension needs to be approved by the core
                team of developers. For privately managed ecosystems, it requires approval of
                the platform leader and frequently involves joining the partner program.




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                    Observation 5: Service platforms are always in the hands of privately owned
                parties. Due to the running costs of an online service, online service platforms
                are always managed by commercial organizations. Even Wordpress.com, which
                is based on the open source content management platform Wordpress, is man-
                aged by Automattic, a commercial entity that contributes to the Wordpress
                community actively.


                5 Governance Tools
                Coordinators of software ecosystems have little insight into the governance tools
                that are available to them. In this section a governance model for ecosystem
                health preservation and improvement is presented, that provides ecosystem co-
                ordinators with a set of tools for maintaining and improving the health of
                the ecosystem, by stimulating growth, economic activity, and robustness of the
                ecosystem. For each of the ecosystem health aspects, being robustness, niche
                creation, and productivity, governance tools are provided. These governance
                tools are provided for four different kinds of ecosystem coordinators. Software
                ecosystem governance is defined as procedures and processes by which a com-
                pany controls, changes or maintains its current and future position in a software
                ecosystem [1]. Although the definition applies to any company in the software
                ecosystem, we focus on the efforts that the “platform leaders” are directing at
                improving their position in the software ecosystem. Furthermore, the health mea-
                sures of Iansiti and Levien [21] and the operationalization of Den Hartigh [13]
                are taken as the starting point for the governance methods, in the sense that we
                focus on robustness, niche creation, and productivity as the core of ecosystem
                health. Furthermore, the typology from the previous section is taken into ac-
                count, to illustrate the difference between a community run software platform, a
                commercially run software platform, a community run standard, and a commer-
                cially run standard. The governance model for ecosystem health preservation is
                presented in figure 1 and is based on the results from the case studies, the Open
                Software Enterprise model [27], the governance model of Baars et al. [1], and the
                work of Den Hartigh et al. [13]. Please note that this work provides a top-down
                view for the governance of an ecosystem. For a more practical bottom-up ap-
                proach one might consult the work “The Art of Community” [2], which provides
                concrete tools for creating, maintaining, and growing an open source community.

                5.1 Software (Service) Platform Governance

                Community-driven software platform - Community driven software plat-
                forms are typically large open source products, but sometimes, such as in the
                case of IntelliCAD, closed source products that are managed by a consortium.
                Coordinators of such communities have to deal with independent individuals
                and organizations that use the platform for their own means, and these coor-
                dinators have to make sure the platform and its development process remain




Proceedings of IWSECO 2012                             51
                                                    Software (service) platform                                                Standard
                                            Community                     Private Entity                    Community                       Private Entity
                                   Expand applicability          Expand applicability            Expand applicability              Expand applicability
                                   Make strategy explicit        Make strategy explicit          Make strategy explicit            Make strategy explicit


                    creation
                     Niche         Create APIs                   Create APIs                     Form subgroups                    Form subgroups
                                   Do co-development             Do co-development
                                   Contrib to comp. platforms    Dev. complementary platforms
                                                                 Develop new business models



                                   Form consortium               Create partnership model        Form consortium                   Protect the standard legally
                                   Grow consortium               Do marketing                    Grow consortium                   Do marketing
                    Robustness




                                   Create subgroups              Grow profits                    Raise memberships                 Raise memberships
                                   Raise entry barriers          Partner development programs    Form alliances                    Evolve platform
                                   Form alliances                Form alliances                  Make consortium explicit          Make partners explicit
                                   Stabilize APIs                Stabilize APIs                  Open up governance                Start certification program
                                   Make consortium explicit      Raise entry barriers            Start certification program
                                   Open up governance            Make partners explicit
                                                                 Propagate operation knowledge



                                   Organize dev days             Organize dev days               Create showcases                  Create showcases
                    Productivity




                                   Create knowledge hubs         Collaborative marketing         Create knowledge hubs             Collaborative marketing
                                   Participate in contests       Create sales partner program                                      Create new sales channels
                                                                 Create new sales channels




                   Fig. 1. Governance Model for Ecosystem Health Preservation and Improvement



                active and healthy [35]. Coordinators have to make sure that sufficient niche
                creation is happening for other parties to join in. Steps that can be taken are
                the creation of APIs, the extension of the applicability of the platform (for in-
                stance by venturing into new domains), and the strategy of the platform must
                be made explicit. By making the strategy explicit, i.e., product lifecycle, acqui-
                sition strategy, platform strategy, and ecosystem strategy, niche players can rest
                assured that their position in the ecosystem will remain safe. Furthermore, com-
                munity coordinators can do co-development and co-funding requests with third
                parties to attract them to the ecosystem. Finally, for niche creation, commu-
                nity coordinators can contribute to complimentary platforms, because as those
                complimentary platforms grow, so does the platform of the coordinators.
                    In regards to robustness, community coordinators must make sure the com-
                munity remains as lively and stable as possible, to provide a strong core to which
                third parties can commit safely. In the beginning, community coordinators can
                form a community to formalize the way in which contributors and third-parties
                can assist in keeping the ecosystem healthy. Once the consortium is explicit,
                it can be grown by attracting new members. Furthermore, subgroups can be
                created to bring together domain specialists in an ecosystem, thereby further
                mobilizing the community itself. To make the ecosystem more stable, a commu-
                nity can further raise the barriers of entry, to create a critical mass of dedicated
                core members who are fully committed to the platform: in the case of the Eclipse
                platform several companies are providing millions of dollars in development for
                the platform, simply to be a strong steering member in the Eclipse ecosystem.




Proceedings of IWSECO 2012                                                                  52
                Next to that, ecosystem coordinators can form alliances with other ecosystems
                to create further complimentaries and subgroups within the ecosystem. Further-
                more, by stabilizing the API, the platform can become a slowly evolving core of
                functionality for the community. Finally, the consortium must be made explicit
                to show the world who are key members of the organization. As a final step,
                the consortium can open up governance, to have the consortium govern itself
                through the years.
                    With respect to productivity, community managers have several tools avail-
                able to make the ecosystem create more value. A typical tool to use is to raise
                awareness and activity surrounding the platform by organizing development days
                and by organizing and participating in contests that require the use of the plat-
                form. Finally, the creation of knowledge hubs enables participants in the com-
                munity to share and find knowledge, thereby making them more productive and
                effective.
                    Privately owned software platform - Private owners of software plat-
                forms, such as Microsoft, Apple, and Autodesk, want to maximize their value
                by penetrating the market as deeply as possible. This penetration is reached
                mostly by associating with domain specific parties that leverage the platform
                within the ecosystem to create value for customers that would have never been
                reached without these domain experts (i.e., niche players). Coordinators of these
                platform-based ecosystems are similar to communities in that they too want to
                continuously increase the use of the platform, however, the main difference is
                that these coordinators want to maximize their profit as well. When looking at
                niche creation, all the same tools can be used as community coordinators do:
                expand the applicability of the platform, make the strategy explicit, create APIs,
                do co-development with partners, and develop or contribute to complimentary
                platforms. Coordinators of commercial platform ecosystems, however, can also
                create niches and business opportunities by introducing new business models
                for third parties. A relevant example is that of the commercial extension mar-
                kets that are on the increase, which enable third parties to make profits from
                customers they previously could not reach.
                    To increase robustness, the private company can do several things to create
                stability and stimulate activity in the ecosystem. Typically, these start with the
                development of a partnership model that enables third parties to participate
                and create value in the ecosystem according to set roles and positions in the
                ecosystem. Furthermore, the general strengthening of the hub and ecosystem
                by doing marketing, raising prices, and growing profit stabilizes the ecosystem
                significantly (within limits). Partners with potential or weak partners can play
                a strong role in (de)stabilizing the ecosystem, so the introduction of a partner
                development program can strengthen weak participants and bring high poten-
                tials closer to the ecosystem. An example of this is when Microsoft pays for
                the development of new extensions in their Windows Mobile Application Mar-
                ket. Also, the forming of alliances with other hubs in ecosystems, the raising of
                entry barriers, and the propagation of software operation knowledge (i.e., how
                the software and its extensions run at customers) throughout the ecosystem can




Proceedings of IWSECO 2012                             53
                raise quality and stability [37]. Raising entry barriers can increase the robustness
                of the ecosystem. By increasing membership fees, raising quality levels, starting
                certification programs, and assigning different levels within the partnership pro-
                grams, the ecosystem will grow a stable core of committed members. Finally,
                the stabilizing of APIs creates consistency within the ecosystem and enables
                partners to create trustworthy and stable extensions to the platform.
                    With respect to productivity, coordinators of a privately owned platform can
                also organize development days to increase activity. Furthermore, collaborative
                marketing and sales can be done, to emphasize that smaller extending third par-
                ties have a respectable relationship with the platform leader. Finally, the creation
                of new sales channels to enable more revenue for the ecosystem participants can
                play a big part in productivity of the ecosystem.

                5.2 Software Standard Governance

                Software standards are different from software platforms in that they represent
                not a platform or a software artifact, but a set of standardized interfaces to
                enable communication and exchange of information across different organiza-
                tions. These standards organizations guard the standard and grow the ecosys-
                tem around it. Governance of these ecosystems is different in several aspects:
                the core of the ecosystem is knowledge, not a software platform. It is highly
                uncommon for a privately owned organization to set a standard, however ex-
                amples are the DWG format of Autodesk, previously Adobe’s PDF format, and
                Microsoft’s Office file formats. In the data set we did not find many commercial
                organizations managing a standard, so the fourth column in figure 1 is mostly
                based on literature.
                    Community Driven Standard - Most standards are driven by a thriv-
                ing community of participating organizations, all with different aims with the
                standard but with a common goal. Examples of such organizations are W3C,
                ISO, and many others. To create niches for a standard, its applicability can be
                extended to include new domains. Furthermore, when a standards organization
                makes its strategy explicit to the community, participants become aware of why
                and how the standard will benefit them and whether they are in direct conflict
                with the community or not. Finally, the establishment of subgroups is beneficial
                for the creation of new niches in which the standard can be applied.
                    In regards to robustness, different tools can be applied to increase it, such as
                the formation of a formalized consortium, the growing of the community, or the
                raising of memberships to strengthen the community organization and ensure
                its continuation in the future. The formation of alliances with other (compli-
                mentary) standards or platforms may also be beneficial, as it encourages further
                adoption of the standard. Also, the community can open up the governance of
                the consortium, for instance by establishing how decisions within the consortium
                must be made. Finally, a certification program enables an ecosystem coordinator
                to raise quality standards and establish certain partners as being highly valuable
                for the ecosystem.




Proceedings of IWSECO 2012                              54
                    In regards to productivity, it is hard for the standards organization to de-
                termine tools for increasing adoption and use of the standard. However, two
                tools that are available and widely used are the use of showcases of how the
                standard has benefited the organization that uses it, and also the creation of
                knowledge hubs to inform participants from different domains about the use of
                the standard.
                    Privately Owned Software Standard - There are some occurrences of
                privately owned software standards, such as the Microsoft Office File Format and
                the DWG File Format of Autodesk, used for the exchange of the 3D drawings.
                The way in which these ecosystems are formed and stimulated are similar to those
                owned by a community or consortium, with the only exception that the standard
                is typically partly closed and protected by intellectual property laws, to leverage
                the advantages of owning a widely used standard, such as the sale of APIs and
                libraries for the reading of such libraries. In regards to niche creation, private
                coordinators can apply the same tools as communities: expand applicability,
                make the strategy of the standard explicit, and form subgroups.
                    To increate robustness, the standard can be legally protected by using user
                licenses and intellectual property law. Furthermore, robustness is determined by
                the strength of the standard, so raising usage fees and doing abundant market-
                ing for it will increase market penetration and stability. Also, the evolution of
                the standard keeps the standard relevant and outmanoeuvres competition. Fi-
                nally, the usage of a partner program and possibly partner certification, further
                stabilizes the ecosystem.
                    In regards to productivity, knowledge hubs must be created, showcases can
                be used to show the effect of using the platform, and collaborative marketing en-
                ables standards users to leverage their partnership with the standard ecosystem
                coordinator. Also, the ecosystem coordinator can assist by creating new sales
                channels, for instance by connecting niche players with potential customers in
                specific domains.
                    The governance model as presented leads from the results from the survey,
                and to a small extend from standards literature. The model does not, however,
                claim to be complete. To achieve completeness, a structured literature survey
                needs to be conducted, which is considered future work. The model can then to
                be extended with the coring and tipping methods of Cusumano and Gawer [18],
                Cusumano’s “levers” [19], and standards governance methods [3, 35].


                6 Discussion and Conclusion
                This paper presents a model for classifying software ecosystems and hopes to
                present a de facto standard for presenting cases and survey results on software
                ecosystems. The model has been kept deliberately simple, but aims to illustrate
                the defining characteristics of software ecosystems. With this model software
                ecosystem researchers can quickly gain insight into the characteristics that define
                any particular ecosystem. The classification model has been used to identify four
                different classes of software ecosystems. For each of these classes governance tools




Proceedings of IWSECO 2012                              55
                have been identified and presented in the software ecosystem governance model
                for health preservation and improvement.
                    At the current stage it is hard to claim completeness of both the classification
                model and the governance model for ecosystem health preservation and improve-
                ment. Part of the future work is to further evaluate the model with ecosystem
                coordinators and to perform a more extensive survey of software ecosystems for
                improved validation of the models. Now that a list of governance tools has been
                created, the applicability of the tools and the dependent situational factors must
                be determined. In the future we hope to create a software ecosystem governance
                maturity model that provides guidelines for improving software ecosystem gover-
                nance, depending on the maturity of a software ecosystem and other situational
                factors.


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