標準號：ISO/IEC TR 9126-2-2003
中文標準名稱：軟件工程.產品質量.第2部分:外部度量標準
英文標準名稱：Software engineering - Product quality - Part 2: External metrics
標準類型：L77
發布日期：1999/12/31 12:00:00
實施日期：1999/12/31 12:00:00
中國標準分類號：L77
國際標準分類號：35.080
引用標準：ISO/IEC 9126-1-2001;ISO/IEC TR 9126-3;ISO/IEC 9126-4;ISO/IEC 14598-1-1999;ISO/IEC 14598-2-2000
適用范圍：This Technical Report defines external metrics for quantitatively measuring external software quality in terms of characteristics and subcharacteristics defined in ISO/IEC 9126-1, and is intended to be used together with ISO/IEC 9126-1. This Technical Report contains: Ⅰ. an explanation of how to apply software quality metrics Ⅱ. a basic set of metrics for each subcharacteristic Ⅲ. an example of how to apply metrics during the software product life cycle This Technical Report does not assign ranges of values of these metrics to rated levels or to grades of compliance, because these values are defined for each software product or a part of the software product, by its nature, depending on such factors as category of the software, integrity level and users' needs. Some attributes may have a desirable range of values, which does not depend on specific user needs but depends on generic factors; for example, human cognitive factors. This Technical Report can be applied to any kind of software for any application. Users of this Technical Report can select or modify and apply metrics and measures from this Technical Report or may define application-specific metrics for their individual application domain. For example, the specific measurement of quality characteristics such as safety or security may be found in International Standards or Technical Reports provided by IEC 65 and ISO/IEC JTC 1/SC 27. Intended users of this Technical Report include: — Acquirer (an individual or organization that acquires or procures a system, software product or software service from a supplier); — Evaluator (an individual or organization that performs an evaluation. An evaluator may, for example, be a testing laboratory, the quality department of a software development organization, a government organization or a user); — Developer (an individual or organization that performs development activities, including requirements analysis, design, and testing through acceptance during the software life cycle process); — Maintainer (an individual or organization that performs maintenance activities); — Supplier (an individual or organization that enters into a contract with the acquirer for the supply of a system, software product or software service under the terms of the contract) when validating software quality at qualification test; — User (an individual or organization that uses the software product to perform a specific function) when evaluating quality of software product at acceptance test; — Quality manager (an individual or organization that performs a systematic examination of the software product or software services) when evaluating software quality as part of quality assurance and quality control.