ISO has eight product quality characteristics in contrast to ISO ‘s six , and 31 subcharacteristics. This page was last edited on 12 September , at 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. 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. Ideally, the internal quality determines the external quality and external quality determines quality in use. Attributes of software that make the software adhere to application related standards or conventions or regulations in laws and similar prescriptions.
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Software product is defined in a broad sense: Views Read Edit View history. On doing so, however, it leaves up to each organization the task of specifying precisely its own model. Retrieved from ” https: The current standard is under review. Internal metrics iso 9126-2 applicable to a iso 9126-2 executable software product during designing and coding in early stage of development process.
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. The objective of this standard is to provide a framework for the evaluation of software quality. Attributes of software that bear on the presence and appropriateness of a set of functions for specified tasks.
This part provides external metrics for measuring software quality characteristics. Attributes of software that make the software adhere to standards or conventions relating to portability.
ISO/IEC – Wikipedia
There is also a definition of quality in use which defines the user’s view iso 9126-2 a result of ixo the software. 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.
Ideally, the internal quality determines the external quality and external quality determines quality in use. As kso result, the notion of user extends to operators as well as to programmers, which are users of components such as software libraries. Quality characteristics iso 9126-2 subcharacteristics. Information technology – Software Product Evaluation – Quality characteristics and guidelines for their use – This standard 9126- from the GE model for describing software quality, presented iso 9126-2 by McCall et al.
Each quality sub-characteristic e.
Attributes of software that bear on the effort needed to install the software in a specified environment. This may be done, for example, by specifying target values for quality iso 9126-2 which evaluates the degree of presence of quality attributes. Attributes of software that bear on opportunity and effort using it in the place of specified other software in the environment of that software. ISO standards by standard number. An attribute is an entity iso 9126-2 can be verified or measured in the software product.
Information technology – Software quality characteristics and metrics – Part 3: 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. Ieo of software that bear on its ability to prevent unauthorized access, iso 9126-2 accidental or deliberate, to programs or data.
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 912-62, either direct or indirect it is not derived from measures of the behaviour of the system. These biases include changing priorities after the start of a project or not having any clear definitions of “success”.
iso 9126-2 Information technology – Software quality characteristics and metrics – Part 1: It defines six product quality characteristics and in an annex provides a suggestion of quality subcharacteristics. The standard provides a framework for organizations to define a quality model for a software product.
Attributes of software that bear on the effort needed for modification, fault removal isl for environmental change.