ISO IEC 19761 pdf download.Software engineering一COSMIC: a functional size measurement method
1 Scope
This International Standard specifies the set of definitions, conventions and activities of the COSMIC Functional Size Measurement Method. It is applicable to software from the following functional domains: a) application software; EXAMPLE Banking, insurance, accounting, personnel, purchasing, distribution or manufacturing. b) real-time software; EXAMPLE Software for telephone exchanges and message switching, software embedded in devices to control machines such as domestic appliances, lifts and car engines, for process control and automatic data acquisition, and within the operating system of computers. c) hybrids of the above. EXAMPLE Real-time reservation systems for airlines or hotels. This International Standard has not been designed for measuring the functional size of a piece of software, or its parts, which ⎯ is characterized by complex mathematical algorithms or other specialized and complex rules, such as can be found in expert systems, simulation software, self-learning software and weather forecasting systems, or ⎯ processes continuous variables such as audio sounds or video images, such as can be found in computer game software, musical instruments and the like.
2 Terms and definitions
For the purposes of this document, the following terms and definitions apply. 2.1 Base Functional Component BFC elementary unit of Functional User Requirements defined by and used by an FSM Method for measurement purposes [ISO/IEC 14143-1:2007, definition 3.1] NOTE The COSMIC Functional Size Measurement Method defines a data movement as a BFC.2.2 Base Functional Component type BFC type defined category of Base Functional Component [ISO/IEC 14143-1:2007, definition 3.2] 2.3 boundary conceptual interface between the software being measured and its functional users NOTE The COSMIC Functional Size Measurement Method uses the term “functional user”, which has a narrower definition than the term “user” as defined in ISO/IEC 14143-1:2007, definition 3.3. In consequence, this International Standard uses “functional user”, rather than “user”. 2.4 data attribute smallest parcel of information, within an identified data group, carrying a meaning from the perspective of the software’s Functional User Requirements 2.5 data group data group type distinct, non empty, non ordered and non redundant set of data attributes where each included data attribute describes a complementary aspect of the same object of interest (see 2.19) 2.6 data manipulation any processing of the data other than a movement of the data into or out of a functional process, or between a functional process and persistent storage 2.7 data movement data movement type Base Functional Component which moves a single data group NOTE 1 The COSMIC Functional Size Measurement Method has four types of data movements: Entry, Exit, Read and Write. These are the Method’s four BFC types. NOTE 2 For measurement purposes, each data movement is considered to account for certain associated data manipulation. 2.8 Entry Entry type data movement that moves a data group from a functional user across the boundary into the functional process where it is required NOTE An Entry is considered to account for certain associated data manipulations (e.g. validation of the entered data). 2.9 Exit Exit type data movement that moves a data group from a functional process across the boundary to the functional user that requires it NOTE An Exit is considered to account for certain associated data manipulations (e.g. formatting and routing associated with the data to be exited).2.10 functional process functional process type elementary component of a set of Functional User Requirements, comprising a unique, cohesive and independently executable set of data movements NOTE 1 It is triggered by a data movement (an Entry) from a functional user that informs the piece of software that the functional user has identified a triggering event, and is complete when it has executed all that is required to be done in response to the triggering event. NOTE 2 In addition to informing the piece of software that the event has occurred, the Entry triggered by the event can include data about an object of interest associated with the event. 2.11 Functional Size Measurement FSM process of measuring Functional Size [ISO/IEC 14143-1:2007, definition 3.7] 2.12 Functional Size Measurement Method specific implementation of FSM defined by a set of rules, which conforms to the mandatory features of ISO/IEC 14143-1:2007 [ISO/IEC 14143-1:2007, definition 3.4] 2.13 functional user user that is a sender and/or an intended recipient of data in the Functional User Requirements of a piece of software
ISO IEC 19761 pdf download
