Research Of Software Requirement Elicitation On Information System

With the social development, most enterprises are developing information systems, some have accomplished the task. However, many problems appeared during the process and the requirement problem becomes the most prominent one. People have been regarded information system as to purchase a set of servers, install a suit of software, and transact daily business procedure on the platform, while seldom carry out project analysis nor sufficient investigation on the requirement. Thus, the requirement is usually incomplete, unclear or inaccurate. Neglecting the long time and complexity of construction of information system, difficulties and risks have been brought to the information system development.According to the situations, on the basis of summarizing experience in actual projects, combining the method of layout of the information system development on the whole, as well as methods of requirement models: Zachman frame, IDEF method, and UML modeling method, this paper brings forward a new requirement elicitation model named Computer Aided Requirement Develop (abbreviate as CARD), aiming at ameliorating the requirement criterion of the information system and the process of exploiting requirement. CARD centers on data modeling, starts with establishing personnel models of enterprise's organization, joins the data model and personnel model with the business model, and builds quality model to fulfill no functional requirements of enterprises at the same time. Then, database structure and demonstration pages can be created to assist achieving prototype system, which can improve requirement quality, reduce the communicating time with correlatives, shorten developing time of projects and ensure success of projects.In the paper, firstly we summarized the development of requirement engineering, educe information demand of requirement analysis, by analyzing and comparing object oriented requirement engineering and structure analysis method. Secondly, on the basis of analyzing three requirement modeling methods which are Zachman frame, IDEF method and UML, decrypted design frame of CARD requirement elicitation system. At Last, the process of development and the application of pivotal technologies are described in detail, then the system's behavior is valued and foreground of progress is expatiated.