The Theory,Method And Practice Of The Software Requirement Eneineering

With the research of software engineering and software application gradually, people realize that the software requirements are no longer limited to the initial stage of software development, but throughout the entire life cycle of system development, and the problems of many software projects are associated with not carring out the work related to software requirements analysis. With the expansion of the scale of software system, and in order to solve the "software crisis", some techniques and methods of software engineeringdevelopment, software engineering was born.In this paper, based on the existing principle and requirement engineering method and combining of the specific cases of software requirement analysis process, introducing a method of the requirement analysis and modeling of a software. The core idea is from the thing,the object,the people and the interface these four main lines, to carry out the theme of domain decomposition, extracting the domain model and the use case model, and then adding the details of content, implementating oriented requirement analysis, to providing a method of evolution of specifications for everyone.