=Paper=
{{Paper
|id=Vol-2800/paper-07
|storemode=property
|title=Quality in Use -Issues and Proposal- (short paper)
|pdfUrl=https://ceur-ws.org/Vol-2800/paper-07.pdf
|volume=Vol-2800
|authors=Shin'Ichi Fukuzumi,Nowky Hirasawa
|dblpUrl=https://dblp.org/rec/conf/apsec/FukuzumiH20
}}
==Quality in Use -Issues and Proposal- (short paper)==
https://ceur-ws.org/Vol-2800/paper-07.pdf
Quality in Use -Issues and proposal-
Shin’ichi fukuzumi Noriko Wada Nowky Hirasawa
RIKEN Meditrina, Otaru University of Commerce
Center for Advanced Intelligence Project Yamanashi, Japan Otaru, Japan
Tokyo, Japan nwada0925@gmail.com hirasawa@ouc-ux.org
Shin-ichi.fukuzumi@riken.jp
Abstract—In ISO/IEC 25010, Quality in Use is mainly focused elements of “Quality in Use”[2]. Figure 1 shows the Quality
to the use of operators who interact with product and system in Use model defined in ISO/IEC 25010.
directly. However, as workstyle using ICT (Information
Communication Technology) has been changed, object of
quality in use are also changed to not only direct users with
simple direct interaction but also many stakeholders and society
which are influence on indirectly by someone use the product,
system and service. This paper proposes a Quality in Use model
which corresponds to stakeholder needs. As for stakeholder, we
classified four groups, that is -Operator of system and/or
software, -Organization which has responsibility for system Figure 1. Quality in Use model defined in ISO/IEC 25010 [2]
and/or software management, -Customer using system and/or
software, -Society which exists system and/or software. As for In this figure, three quality characteristics (effectiveness,
stakeholder needs, we prepare “usefulness”, “managerial efficiency, satisfaction) are same as usability elements defined
stability”, dependability” and “Acceptability”. To show the in ergonomics standard ISO 9241-11: 2018[3]. About
relationship among them, we proposed a new Quality in Use freedom from risk and context coverage, though influence on
model. (Abstract) economy and health is described in the definition, there is no
concrete contents. From this, context of use is mainly focused
Keywords- usability, software engineer, quality in use (key words)
on interaction directly.
Recently, as workstyle using ICT (Information
I. INTRODUCTION Communication Technology) has been changed, object of
Importance of usability has been considered in not only quality in use shall be not only simple direct interaction but
ergonomics area but also software engineering area[1]. also many stakeholders and society which are influence on
Quality model in SQuaRE (System and software Quality indirectly by someone use the product, system and service.
Requirement and Evaluation) series which are dealt with in That is, ICT users are not only direct users who interacts
ISO/IEC JTC1SC7 defined effectiveness, efficiency, system and product directly but also indirect user who use
output obtained by using ICT.
satisfaction freedom from risk and context coverage as
Figure 2. Proposal model of Quality in Use[4]
Copyright © 2020 for this paper by its authors. Use permitted under Creative Commons License Attribution 4.0 International (CC BY 4.0).
-Society which exists system and/or software
The reason why groups are four is to be able to explain
II. FUTURE QUALITY IN USE CONCEPT almost situation by these four groups, i.e. stakeholders.
Direct user means a user who interacts with product, system When “quality in Use” is considered, it is necessary to
or service directly. For example, ATM users in banking clarify which group is focused because quality models for
system, customers for electric commerce system. On the other use of system and product are different by the difference of
hand, there are the other kinds of users, they are indirect users objects described above.
of other stakeholders. They usually use an output of products In this paper, “Quality in Use” is defined as follows:
or system. For example, in case of self-driving car (level four Quality in Use is that degree to the system satisfied the
or low), a driver is one of direct user and operators of traffic stakeholder needs related to use when operator uses the
infrastructure are kinds of secondary user. As for pedestrians, system and software.
they are indirect users. Figure 2 shows the proposal concept Figure 3 show the quality in use models for four groups.
of quality in use include other stakeholders[4].
In this figure, each box about quality in use, that is,
III. PROPOSAL OF QUALITY IN USE “quality in use for responsible organization, people”,
As system and software products are widely used in our “quality in use for operators”, “quality in use for customers”
life, use of them is influence on not only their direct uses but and “quality in use for society” is object group of quality in
also organizations and society. use, respectively. Below four boxes describes influence by
It is responsibility for society of the manufacturer to be use.
controllable these influence as much as possible. In this, “quality in use for operators” is correspond to the
From this, quality is regarded influence on stakeholders original quality in use model. As this model mainly focuses
by using. The purpose of quality in use is that manufacturers on direct user, we consider that elements of usability defined
and managers are able to enforce to “use” for improvement in ISO9241-11:2018 should be adopted as quality
of quality by measuring and evaluating.[5] characteristics in this model. Quality characteristics for the
The objectives which are influenced by use of system other three objects shall be defined by terms which
and software in not only their direct users but also indirect represented each influence suitably.
users included various kinds of stakeholders. Contents of In ISO/IEC25010, the quality of a system is defined that
influence (quality characteristics) are different by the the degree to which the system satisfies the stated and implied
difference of objects. From this, we classify these objects needs of its various stakeholders, and thus provides value.
into four groups shown below and quality in use model for Refer to figure 2., stakeholder needs for quality in use can be
each group is defined. divided following four items; they are “usefulness”,
-Operator of system and/or software “managerial stability”, dependability” and “Acceptability”.
-Organization which has responsibility for system and/or The relationship between stakeholders and stakeholder needs
software management are shown in figure 4. This figure is proposed quality in use
-Customer using system and/or software model.
Figure 3. Quality in use models for four target groups
Figure 4. The relationship among Quality in Use characteristics, subcharacteristics quality property and stakeholder needs
[2] ISO/IEC 25010: Systems and software engineering -Systems and
software Quality Requirements and Evaluation (SQuaRE) — System
IV. FUTURE THEME and software quality, 2011
[3] ISO9241-11: Ergonomics of human-system interaction –Part11:
Currently, we prepare some example to proposed quality Usability for definition and concept (2018)
in use model. Applying these examples to this model, we will [4] Fukuzumi, S. and Hirasawa, Nowky: Usability in software
verify the validity of this model. Pp4 development process -Proposal of society.stakeholder centered design ,
IWESQ2019, 2019
[5] Tanikawa, Y., Suzuki, H., Kato, H., Fukuzumi, S. : Problems in
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