Thứ Tư, 5 tháng 6, 2013

What is the exact definition of "Software Specification"?

A software requirements specification (SRS) is a comprehensive description of the intended purpose and environment for software under development. The SRS fully describes what the software will do and how it will be expected to perform.

- A specification describes WHAT a program does, a design describes HOW the program does it, and documentation describes WHY it does it
- A specification is a document which forms a contract between the customer and the designer.
- A specification is a document by which we can judge the correctness of an implementation.

An SRS minimizes the time and effort required by developers to achieve desired goals and also minimizes the development cost. A good SRS defines how an application will interact with system hardware, other programs and human users in a wide variety of real-world situations. Parameters such as operating speed, response time, availability, portability, maintainability, footprint, security and speed of recovery from adverse events are evaluated. Methods of defining an SRS are described by the IEEE (Institute of Electrical and Electronics Engineers) specification 830-1998.

A specification is a precise, unambiguous and complete statement of the requirements of a system (or program or process), written in such a way that it can be used to predict how the system will behave.