Research on VAF of IFPUG Method Based on Fuzzy Analytic Hierarchy Process

As the weight of the general system characteristics (GSC) in IFPUG method is the same in the different types of software systems. To solve the problem, this article uses the Fuzzy AHP (Analytic Hierarchy Process) approach to assign weight to the fourteen general system characteristics, and gives the improved formula of VAF. It makes IFPUG method more suitable to these other types of software systems besides the information management system. An example of functional size measurement is given to illustrate the feasibility of this method. And it also illustrates that the fuzzy AHP approach can get a better accuracy of the function point counting, and reduces the deviation.