ISO/IEC TS 25052-2:2024

Systems and software engineering — Systems and software Quality Requirements and Evaluation (SQuaRE): cloud services — Part 2: Quality measurement

This document defines quality measures for quantitatively evaluating cloud services quality in terms of characteristics and sub-characteristics defined in ISO/IEC TS 25052-1 and is intended to be used together with ISO/IEC TS 25052-1. This document contains the following: — a basic set of quality measures for each characteristic and sub-characteristics; — an explanation of how to apply quality measures to cloud services. Since the quality model defined in ISO/IEC TS 25052-1 is the extension to the existing quality models defined in ISO/IEC 25010 to ISO/IEC 25019, it can be used with the product quality model, IT service quality model, data quality model, and quality-in-use model according to evaluation purposes. For the same reason, the quality measures defined in this document can also be used with the quality measures for software ICT products, IT services, data, and quality-in-use. As there are several cloud service categories, this document focuses on the quality model of SaaS (software as a service). This document does not address PaaS (platform as a service) and IaaS (infrastructure as a service).

Ingénierie des systèmes et du logiciel — Exigences de qualité et évaluation des systèmes et du logiciel (SQuaRE): services en nuage — Partie 2: Mesure de la qualité

General Information

• Status: Published
• Publication Date: 15-Dec-2024
• ICS: 35.080 - Software
• Technical Committee: ISO/IEC JTC 1/SC 7 - Software and systems engineering
• Drafting Committee: ISO/IEC JTC 1/SC 7 - Software and systems engineering
• Current Stage: 6060 - International Standard published
• Start Date: 16-Dec-2024
• Due Date: 16-Dec-2024
• Completion Date: 16-Dec-2024

Standards Content (Sample)

Technical
Specification
ISO/IEC TS 25052-2
First edition
Systems and software
2024-12
engineering — Systems and
software Quality Requirements
and Evaluation (SQuaRE): cloud
services —
Part 2:
Quality measurement
Ingénierie des systèmes et du logiciel — Exigences de qualité
et évaluation des systèmes et du logiciel (SQuaRE): services
en nuage —
Partie 2: Mesure de la qualité
Reference number
© ISO/IEC 2024
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© ISO/IEC 2024 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Format used for documenting the quality measures . 2
5 Cloud service quality measures . 2
5.1 Overview .2
5.2 Service performance efficiency measures .3
5.2.1 General .3
5.2.2 Time behaviour measures .3
5.2.3 Aggregated resource utilization measures .3
5.2.4 Capacity measures .3
5.2.5 Scalability measures .4
5.2.6 Elasticity measures .4
5.3 Service compatibility measures .5
5.3.1 General .5
5.3.2 Cloud interoperability measures .5
5.4 Service usability measures . .5
5.4.1 General .5
5.4.2 Accessibility measures . . .6
5.5 Service reliability measures .6
5.5.1 General .6
5.5.2 Availability measures .6
5.5.3 Resilience measures .6
5.5.4 Recoverability measures .7
5.6 Service security measures .7
5.6.1 General .7
5.6.2 Confidentiality measures .7
5.6.3 Accountability measures .8
5.6.4 Isolation measures.8
5.6.5 PII protection conformance measures .9
5.6.6 Security responsibility measures .9
5.6.7 Asset protection measures.9
5.7 Service maintainability measures .10
5.7.1 General .10
5.7.2 Maintenance compliance and versioning measures .10
5.7.3 Reversibility measures .10
5.7.4 Monitorability measures .11
5.8 Portability measures .11
5.8.1 General .11
5.8.2 Cloud data portability measures .11
5.8.3 Cloud application portability measures . 12
5.9 Service provisionability measures . 13
5.9.1 General . 13
5.9.2 Service measurability measures . 13
5.9.3 Auditability measures .14
5.9.4 Governability measures .14
5.9.5 Self-provisioning measures . 15
5.9.6 SLA (service level agreement) information completeness measures . 15
5.9.7 SLA (service level agreement) satisfaction measures. 15
5.10 Service responsiveness measures . .16
5.10.1 General .16

© ISO/IEC 2024 – All rights reserved
iii
5.10.2 Service supportiveness measures .16
5.10.3 Reactiveness measures .16
5.10.4 Continuity measures .16
Bibliography .18

© ISO/IEC 2024 – All rights reserved
iv
Foreword
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This document was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology,
Subcommittee SC 7, Software and systems engineering.
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