The Research And Application On Constructive Cost Mode Ⅱ Based On Function Points

With the development of computer technology, software, the increasing scale and complexity are also getting higher and higher. Cost management of software is becoming an important part of a computer software project management. Only by doing this aspect of the gate in order to guarantee the quality and to reduce costs of software development. The software cost estimating is the prerequisite and basis for the cost management. At present, methods to estimate the cost of software applications in foreign countries have relatively extensive, but after the introduction of China "acclimatized".The thesis currently studies COCOMOⅡmodel--one of successful methods for estimating the cost of software. In view of the features of that the current domestic software companies' size are small-to medium-perfect, imperfect management tool, document management irregularities, a lack of high-end software personnel, and staff mobility, it analyzes and screens the cost driving factors of COCOMOⅡmodel. So that it is more suitable for application in the domestic software industry. Then introduced the rules of computing, and its advantages and disadvantages of the measurement of the size and productivity of software Function Point Analysis; according to its shortcomings and in view of the features of that the current domestic software companies' size are small-to medium-perfect, it researches on the implementation norms of Function Point Analysis and suggests the possible implementation norms. And the thesis improves the rules of the complexity.Then, it estimates the scale and the size of the selected project by using the improved COCOMOⅡmodel.After comparing the outcome of the estimating project and the actual workload, the results of an analysis and summary of results showed that the improved COCOMOⅡmodel and Function Point Analysis are more suitable for cost estimates of small and medium-sized software companies.