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 It has been replaced by ISO/IEC.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.

9126-22 of software that make the software adhere to standards or conventions relating to portability. There is also a definition of quality in use which defines the user’s view as a result of using the software. Information technology – Software quality characteristics and metrics – Part 3: Each quality sub-characteristic e.

Use British English Oxford spelling from January Compared to”security” and “compatibility” were added as main characteristics. Attributes of software that bear on response and processing times and on throughput rates in performances its function.

They have been reworded and several new ones added. 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 9162-2, either direct or indirect it is not derived from measures of the behaviour of the system.

The subcharacteristics have been moved from the annex to become part of the standard. Ideally, the internal quality determines the external quality and external quality determines quality in use.

The objective of this standard is to provide a framework for the evaluation of software quality. 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. The standard provides a framework for organizations to define a quality model for a software product. External metrics are applicable to an executable software product during testing or operating in later stage of development and after entering to operation process.

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

ESSI-SCOPE Quality Characteristics and their application

On doing so, however, it leaves up to each organization the task of specifying precisely its own model. Quality-in-use metrics are only available when the final product is used in real conditions. 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. From Wikipedia, the free encyclopedia. These biases include changing priorities after the start of a project or not having any clear definitions of “success”.

This part provides external metrics for measuring software quality characteristics.

ISO/IEC 9126

Attributes of software that bear on the effort needed to install the software in a specified environment. ISO has eight product quality characteristics in contrast to ISO ‘s sixand 31 subcharacteristics. This part provides internal metrics for measuring software quality characteristics. Kso defines six product quality characteristics and in an 91266-2 provides a suggestion of quality subcharacteristics.

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. Information technology – Software Product Evaluation – Quality characteristics ixo guidelines for their use – The current standard is under review.

Attributes of software that bear on the amount of resource used and the duration of such use in performing its function. By using this site, you agree to the Terms of Use and Privacy Policy.

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Software product is defined in a broad sense: 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. 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. Quality characteristics and subcharacteristics. Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks.

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

Information technology – Software quality characteristics and metrics – Part 2: Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software. Views Read Edit View history. 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.

ISO standards by standard number. Attributes of software that bear on its ability to prevent unauthorized access, whether accidental or deliberate, to programs or data. Attributes of software that bear on the effort needed for modification, fault removal or for environmental change. This page was last edited on 12 Septemberat