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 It has been replaced by ISO/IEC.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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Information technology – Software quality characteristics and metrics – Part 3: An internal 9126-22 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.

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. Use British English Oxford spelling from January Each quality sub-characteristic e. Attributes 91126-2 software that bear on the amount of resource used and the duration of such use in performing its function. List of International Electrotechnical Commission standards. From Wikipedia, the free encyclopedia.

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. This part provides internal metrics for measuring software quality characteristics.

They have been reworded and several new ones added. The objective of this standard is to provide a framework for the evaluation of software quality. Attributes of software that bear on the effort needed for modification, fault removal or for environmental change.

Retrieved from ” https: Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software.

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ISO/IEC – Wikipedia

ISO has eight product quality characteristics in contrast to ISO ‘s sixand 31 subcharacteristics. Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks. These biases include 91266-2 priorities after the start of a project or not having any clear definitions of “success”. By using this site, you agree to the Terms of Use and Privacy Policy. This standard stems from oso GE model for describing software quality, presented in by McCall et al.

Information technology – Software quality characteristics and metrics – Part 1: The subcharacteristics have been moved from the annex to become part of the standard. 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.

An attribute is an entity which can be verified or measured in the software product.

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 make the software adhere to application related standards or conventions or regulations in laws and similar prescriptions.

This part provides external metrics for measuring software quality 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.

Attributes are not defined in the standard, as they vary between 9126-22 software products. Compared to”security” and “compatibility” were added as main characteristics. 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. This page was last edited on 12 Septemberat Attributes of software ios 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.

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

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Views Read Edit View history. It defines six product quality characteristics and in an annex provides a suggestion of quality subcharacteristics. External metrics are applicable to an executable software product during testing or operating iwo later stage of development and after entering to operation process.

Quality characteristics and subcharacteristics. Attributes of software that bear on the effort needed to install the software in a specified environment. On doing so, however, it leaves up to each organization the task of specifying precisely its own model.

ESSI-SCOPE Quality Characteristics and their application

Information technology – Software Product Evaluation – Quality characteristics and guidelines for their use – Attributes of software that bear on response and processing times and on throughput rates in performances lso function.

Internal metrics are applicable to a non executable software product during designing and coding in early stage of development process. As a result, the notion of user extends to operators as well as to programmers, which are users of components such as software libraries.

This may 1926-2 done, for example, by specifying target values for quality metrics which evaluates the degree of presence of quality attributes. The current standard is under review. Software product is defined in a broad sense: ISO standards by standard number.

Information technology – Software quality characteristics and metrics – Part 2: Attributes of software that make the software adhere to standards or conventions relating to portability. Attributes of software that bear on its ability to prevent unauthorized access, whether accidental or deliberate, to programs or isoo.

The standard provides a framework for organizations to define a quality model for a software product. Ideally, the internal quality determines the external quality and external quality determines quality in use.

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