O’z DSt ISO/IEC TR 9126-2:2014 PDF

Full title and description

O’z DSt ISO/IEC TR 9126-2:2014 — Programming. Product quality. Part 2: External metrics. This is the Republic of Uzbekistan's national adoption (O’z DSt) of the ISO/IEC TR 9126-2 technical report, providing a set of external software-quality metrics for measuring behaviour of running software and systems.

Abstract

This technical report defines external metrics that can be used to measure attributes of the external quality characteristics in the ISO/IEC 9126 quality model (functionality, reliability, usability, efficiency, maintainability and portability). External metrics apply to the behaviour of a running software product in its operational environment and are intended to be selected, adapted or extended by developers, evaluators and acquirers to fit specific products and contexts.

General information

• Status: Active (national adoption as O’z DSt).
• Publication date: 2014 (national adoption as O’z DSt ISO/IEC TR 9126-2:2014). Note: the original international TR was published in 2003.
• Publisher: Uzbek national standards body (Uzstandard / Uzbek Agency for Technical Regulation — national adoption published as an O’z DSt standard).
• ICS / categories: Information technology — Software (ICS: 35.080 and related 35.* IT categories).
• Edition / version: National adoption of ISO/IEC TR 9126-2 (O’z DSt edition, 2014).
• Number of pages: Approximately 86 pages (matches the original ISO/IEC TR 9126-2 technical report length).

Scope

This document provides a basic set of external metrics and guidance for their application across the external-quality subcharacteristics defined in the ISO/IEC 9126 quality model. It is intended for use during software product life‑cycle activities where behaviour under execution (external behaviour) must be measured, compared or required contractually. The metrics are illustrative rather than exhaustive and are designed to be adapted to product category, integrity level and user needs.

Key topics and requirements

• Definition and explanation of external metrics applicable to running software (behavioural measures).
• Metric examples grouped by external quality characteristics: functionality, reliability, usability, efficiency, maintainability and portability.
• Guidance on selecting, tailoring and applying metrics during the software life cycle (requirements, testing, evaluation, acceptance).
• Guidance that metrics do not prescribe absolute thresholds; values must be defined per product/context.
• Relationship to internal metrics and quality-in-use metrics (complementary parts of the ISO/IEC 9126 series).

Typical use and users

Intended users include software developers, test engineers, quality managers, evaluators, procuring organisations and auditors who need standardized external measures to specify, evaluate or compare software behaviour. Typical uses: defining measurable product requirements, planning acceptance tests, performing independent evaluations and collecting comparative quality data across product releases.

Related standards

Relevant related documents and series include the other parts of ISO/IEC 9126 (Part 1 — Quality model; Part 3 — Internal metrics; Part 4 — Quality in use metrics), the later SQuaRE series (ISO/IEC 25000 family) and ISO/IEC 25023 which provides updated system and software product quality measures that supersede parts of the older 9126 guidance at the international level. Users should be aware that the international ISO/IEC TR 9126 series has been succeeded in the ISO/IEC 25000 (SQuaRE) suite for many purposes.

Keywords

external metrics, software quality, ISO/IEC 9126, O'z DSt, Uzstandard, external measures, functionality, reliability, usability, efficiency, maintainability, portability, software evaluation

FAQ

Q: What is this standard?

A: It is the Republic of Uzbekistan national adoption (O’z DSt) of ISO/IEC TR 9126-2, providing guidance and examples of external metrics for measuring running software behaviour (published nationally in 2014).

Q: What does it cover?

A: External metrics for the external-quality characteristics of software (functionality, reliability, usability, efficiency, maintainability, portability), how to apply and adapt them during the software life cycle, and examples of concrete measures for evaluation and acceptance.

Q: Who typically uses it?

A: Software developers, QA/test teams, evaluators, procurers, and anyone who needs to specify or assess measurable external behaviour of software products.

Q: Is it current or superseded?

A: At the international level, ISO/IEC TR 9126-2 (original TR published in 2003) has been superseded by later SQuaRE outputs (notably ISO/IEC 25023 for product quality measures). However, the O’z DSt national adoption dated 2014 is recorded as an active national document; organisations in Uzbekistan may rely on the national adoption while noting the international evolution to the ISO/IEC 25000 series.

Q: Is it part of a series?

A: Yes — it is Part 2 of the ISO/IEC 9126 series (Parts 1–4 cover quality model, external metrics, internal metrics and quality-in-use metrics). The broader SQuaRE (ISO/IEC 25000) family later consolidated and updated many of these topics.

Q: What are the key keywords?

A: External metrics; software quality; product evaluation; ISO/IEC 9126; O’z DSt; functionality; reliability; usability; efficiency; maintainability; portability.