ISO 9126-2 PDF

ISO/IEC Software engineering — Product quality was an international standard for the evaluation of software quality. It has been replaced by ISO/IEC. ISO/IEC TR (E) ISO/IEC Software engineering – Product quality – Part 2: External metrics Contents Download Table | Examples of the use of base measures in ISO from publication: An Information Model for Software Quality Measurement with ISO.

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As a result, the notion of user extends to operators as well as to programmers, which are users of components such as software libraries. Use British English Oxford spelling from January Software product is defined in a broad sense: It defines six product quality characteristics and in an annex provides a suggestion of quality subcharacteristics.

Attributes of software that bear on response and processing times and on throughput rates in performances its function. Attributes kso not defined in the standard, as they vary between different software products. Attributes of software that bear on its ability to maintain a specified level of performance in case of software faults or of infringement of its specified interface.

An is metric is a quantitative scale and measurement method, which can be used for measuring an attribute or characteristic of a software product, derived from the behaviour of the system of which it is a part. The current standard is under review.

This part provides internal metrics for measuring software quality characteristics. Attributes of software that bear on the amount of resource used and the duration of such use in performing its function.

From Wikipedia, the free encyclopedia. They have been reworded and several new ones added. These biases include changing priorities after the start of a project or not having any clear definitions of “success”.

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External metrics are applicable to an 91262 software product during testing or operating in later stage of development and after entering to operation process. This part provides the concepts introduced in the original standard ie a recommended quality model which categorizes software quality in six characteristics, which are further sub-divided into subcharacteristics.

The standard provides a framework for organizations to define a quality model for a software product. Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software. On doing so, however, it leaves up to each organization the task of specifying precisely its own model.

The objective of this standard is to provide a framework for the evaluation of software quality.

Quality-in-use metrics are only available when the final product is used in real conditions. Information 9162-2 – Software quality characteristics and metrics – Part 1: Information technology – Software quality characteristics and metrics – Part 2: Internal metrics are applicable to a non executable software product during designing and coding in early stage of development process.

ISO 9126: The Standard of Reference

Compared to”security” and “compatibility” were added as main characteristics. Views Read Edit View history. Information technology – Software quality characteristics and metrics – Part 3: Quality characteristics and subcharacteristics. This standard stems from the GE model for describing software quality, presented in by McCall et al. Attributes of software that bear on the capability to re-establish its level of performance and recover the data directly affected in case of a failure and on the time and effort needed for it.

ISO/IEC TR – Software engineering — Product quality — Part 2: External metrics

List of International Electrotechnical Commission standards. This may be done, for example, by specifying target values for quality metrics which evaluates the degree of presence of quality attributes.

Attributes of software that bear on its ability to prevent unauthorized access, whether accidental or deliberate, to programs or data. This page was last edited on 12 Septemberat ISO has eight product quality characteristics in contrast to ISO ‘s sixand ido subcharacteristics. An internal metric is a quantitative scale and measurement method, which can be used for measuring an attribute or characteristic of a software product, derived from the product itself, either direct or indirect it is not derived from measures of the behaviour of the system.

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Attributes of software that bear on the effort needed for diagnosis of deficiencies or causes of failures, or for identification of parts to be modified.

Information technology – Software Product Evaluation – Quality characteristics and guidelines for their use – Retrieved from ” https: This part provides external metrics for measuring software quality characteristics. Attributes of software that bear on the effort needed to install the software in a specified environment. Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks.

Attributes of software that bear on the effort needed for modification, fault removal or for environmental change. By using this site, you agree to the Terms of Use and Privacy Policy. Ideally, the internal quality determines the external quality and external quality determines quality in use. Attributes of software that bear on the opportunity for its adaptation to different specified environments without applying other actions or means than those provided for this purpose for the software considered.

There is also a definition of quality in use which defines the user’s view as a result of using the software.

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