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In software engineering and development, a software metric is a standard of measure of a degree to which a software system or process possesses some property. [1] [2] Even if a metric is not a measurement (metrics are functions, while measurements are the numbers obtained by the application of metrics), often the two terms are used as synonyms.
Halstead's goal was to identify measurable properties of software, and the relations between them. This is similar to the identification of measurable properties of matter (like the volume, mass, and pressure of a gas) and the relationships between them (analogous to the gas equation). Thus his metrics are actually not just complexity metrics.
M = the source metrics value measured by the WMFP analysis stage W = the adjusted weight assigned to metric M by the APPW model N = the count of metric types i = the current metric type index (iteration) D = the cost drivers factor supplied by the user input q = the current cost driver index (iteration) K = the count of cost drivers
Some of the more commonly used metrics are McCabe's cyclomatic complexity metric; Halstead's software science metrics; Henry and Kafura introduced "Software Structure Metrics Based on Information Flow" in 1981, [3] which measures complexity as a function of "fan-in" and "fan-out". They define fan-in of a procedure as the number of local flows ...
GQM defines a measurement model on three levels: [7] 1. Conceptual level (Goal) A goal is defined for an object, for a variety of reasons, with respect to various models of quality, from various points of view and relative to a particular environment. 2. Operational level (Question)
For example, software analytics tools allow users to map derived analysis results by means of software maps, which support interactively exploring system artifacts and correlated software metrics. There are also software analytics tools using analytical technologies on top of software quality models in agile software development companies ...
Software measurement is a quantified attribute (see also: measurement) of a characteristic of a software product or the software process. It is a discipline within software engineering . The process of software measurement is defined and governed by ISO Standard ISO 15939 (software measurement process).
FURPS is an acronym representing a model for classifying software quality attributes (functional and non-functional requirements): Functionality - Capability (Size & Generality of Feature Set), Reusability (Compatibility, Interoperability, Portability), Security (Safety & Exploitability)
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