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 It has been replaced by ISO/IEC.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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The subcharacteristics have been moved from the annex to become part of the standard.

Attributes of software that bear jso the amount of resource used and the duration of such use in performing its function. List of International Electrotechnical Commission standards.

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Attributes of software that bear on its ability to prevent unauthorized access, whether accidental or deliberate, to programs or data. Information technology – Software quality characteristics and metrics – Part 3: They have been reworded and several new ones added.

ISO/IEC – Wikipedia

Attributes are not defined in the standard, as they vary between different software products. It defines six product quality characteristics and in an annex provides a suggestion of quality subcharacteristics. This page was last edited on 12 Septemberat Information technology – Software Product Evaluation – Quality characteristics and guidelines for their use – ISO standards by standard number.

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Use British English Oxford spelling from January Ideally, the internal quality determines the external quality and external quality determines quality in use. Information technology – Software quality characteristics and metrics – Part 2: Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks.

ISO 9126: The Standard of Reference

There is also a definition of quality in use which defines the user’s view as a result of using the software. Internal metrics are applicable to a non executable software product during designing and coding in early stage of development process. This standard stems from the GE model for describing software quality, presented in by McCall et al. Attributes of software that make the software adhere to standards or conventions relating to 912-2.

Each quality 9126-22 e.

ESSI-SCOPE Quality Characteristics and their application

Quality-in-use metrics are only available when the final product is used in real conditions. An external 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. 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.

Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software.

Attributes of software that bear on the effort needed to install the software in a specified environment. The standard provides a framework for organizations to define a quality model for a software product.

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The current standard is under review. From Wikipedia, the free encyclopedia. This part provides internal metrics for measuring software quality characteristics.

ISO/IEC 9126

ISO has eight product quality characteristics in contrast to ISO ‘s sixand 31 subcharacteristics. Attributes of software that bear on response and processing times and on throughput rates in performances its function.

External metrics are applicable to an executable software product during testing or operating in later stage of development and after entering to operation process. Quality characteristics and subcharacteristics.

Retrieved from ” https: Views Read Edit View history. Information technology – Software quality characteristics and metrics – Part 1: Compared 9126–2″security” and “compatibility” were added as main characteristics. 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.

An attribute is an entity which can be verified or measured in the software product. This may be done, for example, by specifying target values for quality metrics which evaluates the degree of presence of quality attributes. This part provides external metrics for measuring software quality characteristics.