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 It has been replaced by ISO/IEC.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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Retrieved from ” https: An attribute is an entity which can be verified or measured in the software product. Internal metrics are applicable to a non executable software product during designing and coding in early stage of development process. It defines six product quality characteristics and in an annex provides a suggestion of quality subcharacteristics.

Attributes are not defined in the standard, as they vary between different software products. Attributes of software that bear on the effort needed for modification, fault removal or for environmental change. List of International Electrotechnical Commission standards. The objective of this standard is to provide a framework for the evaluation of software quality.

ISO standards by standard number. Information technology – Software quality characteristics and metrics – Part 3: Software product is defined in a broad sense: These biases include changing priorities after the start of a project or not having any clear definitions of “success”.

Attributes of software that bear on its ability to prevent unauthorized access, whether accidental or deliberate, to programs or data. This part provides external metrics for measuring software quality characteristics. Use British English Oxford spelling from January External metrics are applicable to an executable software product during testing or operating in later stage of development and after entering to operation process.

916-2 doing so, however, it leaves up to each organization the task of specifying precisely its own model. Attributes of software that make the software adhere to application 99126-2 standards or conventions or regulations in laws and similar prescriptions.

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ESSI-SCOPE Quality Characteristics and their application

This page was last edited on 12 Septemberat Quality characteristics and subcharacteristics. By using this site, you agree to the Terms of Use and Privacy Policy. This may be done, sio example, by specifying target values for quality metrics which evaluates the degree of presence of quality attributes. Attributes of software that bear on the amount of resource 912-2 and the duration of such use in performing its function. 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.

Attributes of software that bear on the effort needed to install the software in a specified environment. From Wikipedia, the free encyclopedia. This part provides internal metrics for measuring software quality characteristics. Compared to”security” and “compatibility” were added as main characteristics.

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. As a result, the notion of user extends to operators as well as to programmers, which are users of components such as software libraries. Views Read Edit View history. Information technology – Software quality characteristics and metrics – Part 2: 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 9126: The Standard of Reference

Attributes of software that bear on response and processing times and on throughput rates in performances its function. There is also a definition of quality in use which defines the user’s view as a result of using isoo software. 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.

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The standard provides a framework for organizations to define a quality model for a software product. Information technology – Software Product Evaluation – Quality characteristics and guidelines for their use – 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.

ISO/IEC 9126

Information technology – Software quality characteristics and metrics – Part 1: Ideally, the internal quality determines the external quality and external quality determines quality in use. This standard stems from the GE model for describing software quality, presented in by McCall et al.

Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks. The current standard is under review. Each quality sub-characteristic e. Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software. 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.

Attributes of software that make the software adhere to standards or conventions relating to portability. The subcharacteristics have been moved from the annex to become part of the standard. Quality-in-use metrics are only available when the final product is used in real conditions.

They have been reworded and several new ones added. 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.