<!DOCTYPE article PUBLIC "-//NLM//DTD JATS (Z39.96) Journal Archiving and Interchange DTD v1.0 20120330//EN" "JATS-archivearticle1.dtd">
<article xmlns:xlink="http://www.w3.org/1999/xlink">
  <front>
    <journal-meta>
      <journal-title-group>
        <journal-title>L. Koch de Souza);</journal-title>
      </journal-title-group>
    </journal-meta>
    <article-meta>
      <title-group>
        <article-title>Sustainable Transformation of IT Service Management: A PhD Research Plan for Green ITSM</article-title>
      </title-group>
      <contrib-group>
        <contrib contrib-type="author">
          <string-name>Larissa Koch de Souza</string-name>
          <email>larissa.koch-de-souza@bwi.uni-stuttgart.de</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="author">
          <string-name>Dr. Georg Herzwurm</string-name>
          <email>2georg-herzwurm@bwi.uni-stuttgart.de</email>
          <xref ref-type="aff" rid="aff0">0</xref>
        </contrib>
        <contrib contrib-type="editor">
          <string-name>IT Service Management (ITSM), Sustainability, Green IS, Sustainable Transformation</string-name>
        </contrib>
        <aff id="aff0">
          <label>0</label>
          <institution>Wirtschaftsinformatik 2, University of Stuttgart</institution>
          ,
          <addr-line>Keplerstr. 17, 70174 Stuttgart</addr-line>
          ,
          <country country="DE">Germany</country>
        </aff>
      </contrib-group>
      <pub-date>
        <year>2026</year>
      </pub-date>
      <volume>000</volume>
      <fpage>0</fpage>
      <lpage>0003</lpage>
      <abstract>
        <p>IT organizations face increasing pressure to embed sustainability, and the intersection of information systems (IS) and sustainability has received growing attention in research over the last years. Yet, within IT service organizations specifically, dominant IT Service Management (ITSM) theory and frameworks still prioritize efficiency and standardization while giving limited attention to environmental and social goals. Generally, Green IS examines how information systems enable sustainability in business processes. However, little is known about how the routines, governance mechanisms and operational practices that constitute ITSM influence on ecological sustainability outcomes. Therefore, this research analyses the cause-and-effect relations between ITSM and ecological sustainability and develops a Green ITSM framework that integrates sustainability principles across ITSM processes. Following a multi-stage approach, a systematic literature review and semi-structured expert interviews inform the contents of the Green ITSM framework, which will be then evaluated through a criteria-based gap analysis against current ITSM standards. The results of this research aim to deepen the understanding within Green IS and clarify the specific role of ITSM for ecological sustainability, while delivering a prioritized catalogue of sustainable ITSM practices and operationalized guidance for metrics and governance. The expected outcomes aim to be relevant for Green IS and ITSM research, as well as to practitioners in both fields.</p>
      </abstract>
    </article-meta>
  </front>
  <body>
    <sec id="sec-1">
      <title>1. Introduction</title>
      <p>
        As the growing influence of digital transformation continues to raise concerns about their
environmental and social impact [11, 24] and digital technologies continue to shape modern
organizations, sustainability is increasingly emerging as a strategic priority [10, 18]. As a result,
recent developments such as the EU Corporate Sustainability Reporting Directive [12] oblige many
firms to disclose detailed information on their environmental, social, and governance impacts in their
management reports, leading to an ever-growing number of companies that are trying to integrate
sustainability into their corporate objectives and IT strategies [20]. This demand for sustainable
transformation applies not only to hardware products in the IT sector, but also to the IT services
industry [27]. In light of global challenges such as climate change and social injustice, it is becoming
increasingly important to integrate sustainability into the core structures of IT service organizations
and processes. Given the complexity of effectively managing digital transformations and IT service
ecosystems, frameworks that specifically structure and optimize IT service management (ITSM) are
becoming increasingly important [17]. ITSM provides service-oriented governance that aligns
business needs with IT capabilities and helps deliver efficiency and quality improvements in complex
settings [
        <xref ref-type="bibr" rid="ref4 ref9">4, 9, 15, 17</xref>
        ]. The ITSM approach can, thus, provide a suitable solution for managing complex
organizational environments, which is necessary in order to achieve holistic sustainability goals.
Copyright © 2025 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0
International (CC BY 4.0).
      </p>
      <p>
        However, sustainability is only weakly embedded in the ITSM literature and in current
practitioner guidance [15]. Early links, such as ITSM’s role in Green IT [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ] and exploratory notions
of Green ITSM [30], are dated and, furthermore, lack causal explanations, actionable frameworks,
and evaluation. Practitioner guidance has begun to acknowledge the theme (e.g. [
        <xref ref-type="bibr" rid="ref5">5</xref>
        ]), yet it remains
prescriptive and concentrates on high-level integration within the IT Infrastructure Library (a best
practice framework for ITSM practitioners) rather than providing a theoretically grounded account.
In general, there is currently no systematic, empirically validated bridging framework that connects
ITSM processes with sustainability objectives and metrics, particularly with regard to ecological
sustainability.
      </p>
      <p>This research responds to this identified knowledge gap by connecting current ITSM research and
objectives with ecological sustainability principles to develop a Green ITSM framework. The goal is
motivated by the growing urgency of sustainable solutions in the IT industry and the increasing
interest of companies in adopting ecologically sustainable practices. Given the rising demand for
sustainable IT and IT services, and the corresponding need for strategic guidance, a comprehensive
guide that supports organizations in implementing ecologically sustainable ITSM processes is
required and motivates this dissertation.</p>
    </sec>
    <sec id="sec-2">
      <title>2. Related work</title>
      <p>
        Two primary research streams form the theoretic base of this dissertation. First, research on ITSM
has established service‐oriented governance that aligns business requirements with IT capabilities
through a combination of IT, people and processes [
        <xref ref-type="bibr" rid="ref3">3, 22</xref>
        ]. Empirical and practical work reports gains
in coordination, transparency and service quality across complex organizational settings, but gives
limited attention to ecological sustainability objectives [
        <xref ref-type="bibr" rid="ref4">4, 17</xref>
        ]. Second, the Green Information Systems
(Green IS) literature examines both reduction of the digital footprint and IS-enabled sustainability
transformations, covering aspects such as corporate sustainability through
business-and-ITalignment [14], carbon risk taxonomy [23], circularity practices [11, 24] and socio-technical change
in organizations [32]. In doing so, Green IS research explicitly addresses ecological sustainability and
stems from research on sustainability for the context of IS. Sustainability itself has become a
fundamental principle in the design and operation of future-proof digital infrastructures and services.
Originally defined by the World Commission on Environment and Development (WCED) [31] and
later developed further in Elkington’s [16] triple bottom line, sustainability encompasses three
interrelated dimensions that can be further operationalized for potential ITSM alignment:
environmental integrity (e.g. energy and carbon reduction alongside the IT service lifecycle), social
equity (e.g. supplier responsibility and accessibility of services) and economic viability (e.g.
reliability, cost efficiency, value delivery). Today, global ecological and economic changes are
affecting a wide range of sectors, including the IT services sector, where sustainability issues are
becoming increasingly urgent [10]. From an economic perspective, ITSM emphasizes objectives such
as cost efficiency, service reliability and value delivery [
        <xref ref-type="bibr" rid="ref8">8,29</xref>
        ], thereby already touching on the
economic dimension of sustainability, whereas explicit ecological targets and environmental
performance indicators are rarely integrated into ITSM practices in a systematic way. In fact, many
IT service providers have not yet implemented the ecologically sustainable practices and often
underestimate their long-term benefits and necessity [
        <xref ref-type="bibr" rid="ref7">7, 21</xref>
        ]. This is problematic not only because
sustainability is a key issue for many industries, but also because the IT industry itself contributes to
environmental degradation [13, 24].
      </p>
      <p>
        Work that explicitly bridges ITSM and Green IS specifically, however, is sparse and comparatively
dated. Early contributions argued that ITSM could serve as an organizational lever for Green IT but
found limited environmental guidance in prevailing practices and uneven adoption across firms [
        <xref ref-type="bibr" rid="ref1">1</xref>
        ].
An exploratory pre-study on Green ITSM reported practitioner demand for extending ITSM
standards, suggested a positive association between ITSM maturity and Green IT adoption, and
surfaced differences between sustainability-related service issues and conventional incidents;
however, it offered only preliminary and conceptual constructs with little empirical evaluation [30].
Since then, there have been no notable studies focused on the intercorrelation of sustainable practices
and ITSM. However, practitioner guidance has begun to acknowledge the potential of this topic [
        <xref ref-type="bibr" rid="ref5">5</xref>
        ].
Yet, this remains descriptive and is not embedded in an academically validated ITSM research design.
      </p>
      <p>This dissertation addresses the identified knowledge gap by researching the interconnection of
ITSM and ecological sustainability, as well as the important role of ITSM for sustainable
transformation and actionable guidance for the establishment of sustainability-aligned ITSM
processes.</p>
    </sec>
    <sec id="sec-3">
      <title>3. Objectives and research question</title>
      <p>This thesis aims to design and evaluate a Green ITSM Framework that embeds ecological
sustainability into IT service management without undermining the reliability and value delivery
central to ITSM. The guiding research question is: How can ecological sustainability be integrated into
the ITSM of enterprise IT departments and what would a Green ITSM framework have to look like? The
work focuses on established ITSM theory combined with the ecological dimension of the
triplebottom-line framework [16], makes explicit the links and transformation opportunities through
which ITSM can shape environmental outcomes, and translates these pathways into actionable
governance mechanisms, roles, and metrics.</p>
      <p>To address this question, the research follows a set of incremental objectives. It first clarifies the
cause-and-effect relations between ITSM and environmental outcomes and consolidates the pillars
and core components of ITSM that are most relevant for ecological sustainability. It then diagnoses
why current ITSM practice falls short and specifies the organizational contexts that require an
ecologically sustainable ITSM. Finally, the intended result aims to be an implementable and
actionable artifact accompanied by guidance for measurement and continuous improvement, whose
utility will be examined and evaluated for practical success based on theory and practice research.
All in all, these steps operationalize the research question and structure the path toward a validated
Green ITSM framework.</p>
    </sec>
    <sec id="sec-4">
      <title>4. Research design</title>
      <p>
        The research design of this dissertation aims to systematically examine and analyze the integration
of sustainable ITSM using a multi-stage approach. Conceptually, the study follows a Design Science
Research (DSR) logic as outlined by Hevner et al. [
        <xref ref-type="bibr" rid="ref2">2</xref>
        ] and operationalized by Peffers et al. [19]. After
a brief orientation that motivates the topic and states the research questions, the research proceeds
through five theoretical and empirical stages that build on each other to produce valid and actionable
results. Overall, these stages cover the core DSR activities of problem identification, defining
objectives, designing and developing an artifact, demonstrating it and evaluating its utility.
      </p>
      <p>
        First, a systematic literature review (SLR) forms the central theoretical component. Following
Kitchenhams [
        <xref ref-type="bibr" rid="ref6">6</xref>
        ] approach, the SLR synthesizes prior work on ITSM and sustainability along two
dimensions: the foundational constructs of each domain and the cause-and-effect relations between
service-management activities and sustainability outcomes, with a focus on ecological aspects.
Search strings include terms such as “Sustainable ITSM,” “Green ITSM,” and combinations like
“Green IS” AND “IT Service Management”. Searches will span across different databases such as
ACM Digital Library, AIS eLibrary, IEEE Xplore, Scopus and Web of Science. The literature search
then follows a multi-stage screening process, beginning with an initial broad search, followed by
exclusions based on basic criteria (e.g. language, recency), thematic relevance through title and
abstract screening, and final full-text screening to identify the final studies for categorization and
analysis. The aim of this first methodical step is to identify key ecological sustainability principles
relevant to Green IS and to examine the basic structure and correlation with ITSM – resulting in a
first, theory-based synthesis.
      </p>
      <p>Second, semi-structured expert interviews validate and enrich the theoretical results.
Interviews will involve ITSM practitioners, sustainability specialists, and leaders of IT departments
that apply ITSM practices. Following Brinkmann and Kvale [28], open-ended prompts enable
indepth discussion. Analysis uses qualitative content analysis [25] to identify recurring themes and
patterns. This practice-oriented synthesis clarifies, challenges, and refines insights from the SLR.
Third, the theoretical and practical insights are integrated into an initial Green ITSM
framework that specifies principles, roles, processes, and metrics spanning the ITSM lifecycle. In
line with the DSR logic, this step corresponds to the design and construction of an artifact that
operationalizes ecological sustainability objectives within ITSM processes.</p>
      <p>Fourth, the framework undergoes a first evaluation by criteria-based gap analysis against
current ITSM standards and widely used frameworks (e.g. the IT Infrastructure Library).
Sustainability principles and the proposed Green ITSM design elements are mapped to the existing
structure of these standards to identify overlaps, gaps, and areas requiring adaptation. The evaluation
criteria are based on the contents from the SLR and expert interviews, thus ensuring its relevance
and reliability.</p>
      <p>Fifth, and following the gap-comparison, a case application of the framework is planned within
ITSM teams in industry settings. Following [26], the case study gathers context-rich evidence on how
the recommended practices can be integrated. The analysis identifies best practices, challenges, and
concrete recommendations for broader adoption. Iterative reflection and feedback cycles with both
practitioners and academic scholars guide refinement until the framework is proven to be applicable,
ecologically meaningful, and conceptually robust. Within the DSR logic, this step corresponds to
demonstration and further evaluation of the artifact in its real-world context.</p>
      <p>Overall, this research result comprises of a synthesis of theoretical and empirical findings that
provides actionable recommendations for integrating sustainable principles into ITSM in order to
establish a holistic and theory-based management approach for sustainable IT service lifecycles. The
recommendations include practical steps for adapting ITSM processes in line with ecological
sustainability principles, supported by both literature and real-world insights and validated by expert
feedback. The work highlights the far-reaching implications of these adaptations and emphasizes
their potential to drive the sustainable transformation of the IT industry. The chosen DSR-oriented
methodology ensures scientifically robust findings with theoretical and practical relevance, thus
contributing to the advancement of research and practice in the context of the urgently needed
ecologically sustainable (IT service) transformation.</p>
    </sec>
    <sec id="sec-5">
      <title>5. Planned timeline</title>
      <p>The thesis is planned from June 2025 until the end of 2028 and proceeds in five phases. In Phase 1
the focus is on a theory synthesis. The plan is to conduct a full systematic literature review on ITSM
and ecological sustainability (with emphasis on the Green IS context), to build a conceptual definition
and first draft for a possible framework interconnecting ITSM pillars to environmental sustainability.
In Phase 2 the theoretical synthesis is complemented by a practice-oriented synthesis based on
industry insights and expert knowledge. This will take place throughout 2026, where semi-structured
interviews with experts in ITSM and Green IS are conducted and analyzed. Phase 3 covers artifact
development based on both syntheses. This is scheduled for late 2026 to mid 2027 with selective
updates from current and related literature as needed. In Phase 4 the Green ITSM framework is
evaluated from late 2027 into early 2028. The evaluation includes a criteria-based gap analysis against
the then current ITSM standard, most likely the latest IT Infrastructure Library version, followed by
a case study and academic evaluation to obtain firsthand evidence on applicability and usability.
Lastly, findings from all prior phases are consolidated and the framework is refined based on
evaluation results. The thesis is then finalized as a monograph and prepared for defense. Across all
phases, related subtopics and initial insights (for example, a working definition of Green ITSM from
Phase 1) are planned for submission to conferences or journals.</p>
    </sec>
    <sec id="sec-6">
      <title>6. Expected Results</title>
      <p>The thesis will deliver a validated Green ITSM Framework that integrates environmental
sustainability into the ITSM lifecycle through clearly articulated design principles, roles, processes
and governance mechanisms. A first central output is a cause-and-effect map linking ITSM decisions
to environmental sustainability outcomes, accompanied by a prioritized catalogue of ITSM practices
and an associated measurement model covering operational (e.g. reliability, cost) and impact
indicators (e.g. energy use, circularity) in order to establish ecologically sustainable ITSM. The
developed Green ITSM framework will be aligned with current theory and established ITSM practices
and, overall, offer adoption guidance for the sustainable design of service management within IT
across the ITSM lifecycle. The planned evaluation is intended to demonstrate that the framework is
practically applicable and useful, supports ecological improvements without compromising core
ITSM objectives and can be transferred across different organizational contexts (proof-of-value).</p>
      <p>Empirically, the research will produce a theory synthesis on the combination of ITSM with Green
IS research, a number of coded expert interviews and case-based evaluation evidence that
demonstrates applicability across organizational contexts. Academic contributions include a
consolidation of the fragmented Green IS and ITSM literatures, generalizable design knowledge for
sustainable ITSM, and recommendations for future testing. In particular, the results are expected to
extend Green IS research by conceptualizing Green ITSM as a distinct sub-stream that provides a
structured lens on sustainability-oriented ITSM. Practitioner contributions include actionable
principles, governance mechanisms and metrics that enable organizations to operationalize
ecologically sustainable ITSM at scale.</p>
    </sec>
    <sec id="sec-7">
      <title>Declaration on Generative AI</title>
      <p>The author(s) have not employed any Generative AI tools.
[10] E. Cagno, A. Neri, M. Negri, C. A. Bassani, T. Lampertico, The role of digital technologies in
operationalizing the circular economy transition: A systematic literature review, Applied
Sciences 11 (8) (2021). doi:10.3390/app11083328.
[11] Ellen MacArthur Foundation, Towards a circular economy: Business rationale for an accelerated
transition, Ellen MacArthur Foundation, 2015. URL: https://ellenmacarthurfoundation.org
[12] European Parliament and Council of the European Union, Directive (EU) 2022/2464 of the
European Parliament and of the Council of 14 December 2022 amending Regulation (EU) No
537/2014, Directive 2004/109/EC, Directive 2006/43/EC and Directive 2013/34/EU, as regards
corporate sustainability reporting, Official Journal of the European Union L 322 (2022) 15–80.</p>
      <p>URL: https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32022L2464
[13] F. Figge, A. S. Thorpe, M. Gutberlet, Definitions of the circular economy—Circularity matters,</p>
      <p>Ecological Economics 208 (2023).
[14] F. Loeser, K. Erek, F. Limbach, R. Zarnekow, Shared Domain Knowledge in Strategic Green IS
Alignment: An Analysis from the Knowledge-Based View, in: Proceedings of the 46th Hawaii
International Conference on System Sciences (2013) 3515–3524.
[15] H. Gunawan, A. B. P. Irianto, J. G. P. Negara, Implementation of sustainable service
improvement in organizations using the ITIL framework, Procedia Computer Science 234 (2024)
748–755. doi:10.1016/j.procs.2024.03.061.
[16] J. Elkington, Cannibals with Forks: The Triple Bottom Line of 21st Century Business, Capstone,</p>
      <p>Oxford, UK, 1997.
[17] J. Iden, T. R. Eikebrokk, Implementing IT service management: A systematic literature review,
International Journal of Information Management 33 (3) (2013) 512–523.
doi:10.1016/j.ijinfomgt.2013.01.004.
[18] J. Korhonen, C. Nuur, A. Feldmann, S. E. Birkie, Circular economy as an essentially contested
concept, Journal of Cleaner Production 175 (2018) 544–552. doi:10.1016/j.jclepro.2017.12.111.
[19] K. Peffers, T. Tuunanen, M. A. Rothenberger, S. Chatterjee, A design science research
methodology for information systems research, Journal of Management Information Systems 24
(3) (2007) 45–77. doi: 10.2753/MIS0742-1222240302.
[20] L. Breitmoser, J. Baumüller, D. Helbig, J. Mayr, Materiality Matters: Einblicke in die erste
ESRSBerichtssaison in Deutschland und Österreich, WWF Deutschland und Technische Universität
Wien, 2025.
[21] L. Koch de Souza, M. Engstler, Advancing sustainability in IT consulting: Introducing a circular
economy maturity model, in: I. Đurđević Babić, V. Galzina, A. Bilić (Eds.), Conference
Proceedings of the 2nd International Online Scientific Conference “Information and
Communication Technology in Life” (ICTiL): Forging Tomorrow (2024) 1-26.
[22] M. Jäntti, V. Hotti, Defining the relationships between IT service management and IT service
governance, Information Technology and Management 17 (2) (2016) 141–150.
doi:10.1007/s10799-015-0239-z.
[23] M.-F. Körner, A. Michaelis, S. Spazierer, J. Strüker, Accelerating sustainability in companies: A
taxonomy of information systems for corporate carbon risk management, in: Proceedings of the
31st European Conference on Information Systems (ECIS 2023), 2023.
[24] N. M. P. Bocken, Business models for sustainability, Oxford Research Encyclopedia of</p>
      <p>Environmental Science (2023). doi: 10.1093/acrefore/9780199389414.013.842
[25] P. Mayring, Qualitative content analysis, Forum Qualitative Sozialforschung / Forum:</p>
      <p>Qualitative Social Research 1 (2) (2000) Art. 20. doi: 10.17169/fqs-1.2.1089
[26] R. K. Yin, Case Study Research and Applications: Design and Methods, 6th. ed., Sage, Thousand</p>
      <p>Oaks, CA, 2018.
[27] R. R. Harmon, N. Auseklis, Sustainable IT services: Assessing the impact of green computing
practices, in: Proceedings of PICMET 2009 (Portland International Conference on Management
of Engineering &amp; Technology) (2009) 1707–1717. doi: 10.1109/PICMET.2009.5261969.
[28] S. Brinkmann, S. Kvale, InterViews: Learning the Craft of Qualitative Research Interviewing,
3rd. ed., Sage, Thousand Oaks, CA, 2015.
[29] T. Almeida, J. B. de Vasconcelos, G. Pestana, A knowledge management architecture for
information technology services delivery, in: Proceedings of the 13th Iberian Conference on
Information Systems and Technologies, IEEE Computer Society (2018) 1–4. doi:
10.23919/CISTI.2018.8399202.
[30] S. w, N. Reiter, Green IT-Service-Management: Eine empirische Voruntersuchung der
konzeptionellen Grundlagen, in: Proceedings der Multikonferenz Wirtschaftsinformatik
(MKWI) 110, 2013.
[31] WCED, Our Common Future: World Commission on Environment and Development, Oxford</p>
      <p>University Press, 1987.
[32] X. Wang, S. Brooks, S. Sarker, A review of Green IS research and directions for future studies,
Communications of the Association for Information Systems 37, 2015. doi:
10.17705/1CAIS.03721.</p>
    </sec>
  </body>
  <back>
    <ref-list>
      <ref id="ref1">
        <mixed-citation>
          [1]
          <string-name>
            <given-names>A.</given-names>
            <surname>Cater-Steel</surname>
          </string-name>
          , W.-G. Tan,
          <article-title>The role of IT service management in Green IT</article-title>
          ,
          <source>Australasian Journal of Information Systems</source>
          <volume>17</volume>
          (
          <issue>1</issue>
          ) (
          <year>2011</year>
          )
          <fpage>107</fpage>
          -
          <lpage>125</lpage>
          . doi:
          <volume>10</volume>
          .3127/ajis.v17i1.
          <fpage>609</fpage>
          .
        </mixed-citation>
      </ref>
      <ref id="ref2">
        <mixed-citation>
          [2]
          <string-name>
            <given-names>A. R.</given-names>
            <surname>Hevner</surname>
          </string-name>
          ,
          <string-name>
            <given-names>S. T.</given-names>
            <surname>March</surname>
          </string-name>
          , J. Park, S. Ram,
          <article-title>Design science in information systems research</article-title>
          ,
          <source>MIS Quarterly 28 (1)</source>
          (
          <year>2004</year>
          )
          <fpage>75</fpage>
          -
          <lpage>105</lpage>
          . doi:
          <volume>10</volume>
          .2307/25148625.
        </mixed-citation>
      </ref>
      <ref id="ref3">
        <mixed-citation>
          [3]
          <string-name>
            <given-names>A.</given-names>
            <surname>Shrestha</surname>
          </string-name>
          ,
          <string-name>
            <given-names>A.</given-names>
            <surname>Cater-Steel</surname>
          </string-name>
          ,
          <string-name>
            <given-names>M.</given-names>
            <surname>Toleman</surname>
          </string-name>
          ,
          <article-title>Innovative decision support for IT service management</article-title>
          ,
          <source>Journal of Decision Systems</source>
          <volume>25</volume>
          (
          <year>2016</year>
          )
          <fpage>486</fpage>
          -
          <lpage>499</lpage>
          . doi:
          <volume>10</volume>
          .1080/12460125.
          <year>2016</year>
          .
          <volume>1187424</volume>
          .
        </mixed-citation>
      </ref>
      <ref id="ref4">
        <mixed-citation>
          <article-title>[4] AXELOS, ITIL Foundation: ITIL 4 Edition, TSO (The Stationery Office</article-title>
          ),
          <year>2019</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref5">
        <mixed-citation>
          <article-title>[5] AXELOS, ITIL® 4: Sustainability in Digital and IT (SDIT)</article-title>
          ,
          <source>TSO (The Stationery Office)</source>
          ,
          <year>2021</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref6">
        <mixed-citation>
          [6]
          <string-name>
            <given-names>B.</given-names>
            <surname>Kitchenham</surname>
          </string-name>
          ,
          <string-name>
            <given-names>S. M.</given-names>
            <surname>Charters</surname>
          </string-name>
          ,
          <article-title>Guidelines for performing systematic literature reviews in software engineering</article-title>
          ,
          <source>Technical Report EBSE-2007-01</source>
          , School of Computer Science and Mathematics, Keele University,
          <year>2007</year>
          .
        </mixed-citation>
      </ref>
      <ref id="ref7">
        <mixed-citation>
          [7]
          <string-name>
            <given-names>C.</given-names>
            <surname>Lieder</surname>
          </string-name>
          ,
          <string-name>
            <given-names>A.</given-names>
            <surname>Rashid</surname>
          </string-name>
          ,
          <article-title>Towards circular economy implementation: A comprehensive review in context of manufacturing industry</article-title>
          ,
          <source>Journal of Cleaner Production</source>
          <volume>115</volume>
          (
          <year>2016</year>
          )
          <fpage>36</fpage>
          -
          <lpage>51</lpage>
          . doi:
          <volume>10</volume>
          .1016/j.jclepro.
          <year>2015</year>
          .
          <volume>12</volume>
          .042.
        </mixed-citation>
      </ref>
      <ref id="ref8">
        <mixed-citation>
          [8]
          <string-name>
            <surname>D. MacLean</surname>
          </string-name>
          , R. Titah,
          <article-title>Conceptualizing IT service management as a management control system for business-IT alignment</article-title>
          ,
          <source>in: Proceedings of the 24th Americas Conference on Information Systems</source>
          (
          <year>2018</year>
          )
          <fpage>15</fpage>
          .
        </mixed-citation>
      </ref>
      <ref id="ref9">
        <mixed-citation>
          [9]
          <string-name>
            <surname>D. MacLean</surname>
          </string-name>
          , R. Titah,
          <article-title>Implementation and impacts of IT service management in the IT function</article-title>
          ,
          <source>International Journal of Information Management</source>
          <volume>70</volume>
          (
          <year>2023</year>
          )
          <article-title>102628</article-title>
          . doi:j.ijinfomgt.
          <year>2023</year>
          .
          <volume>102628</volume>
          .
        </mixed-citation>
      </ref>
    </ref-list>
  </back>
</article>