Research And Application Of Fussy Set On The Cost Management Of Software Project

The software project cost estimation having played an important role in the developed of the software project. It is difficult to estimate the cost of project. In order to control the cost and schedule of the software effectively, a reasonable and accurate method for software cost estimation is necessary.In existing estimation models, COCOMO(Constructive Cost Model) is one of the widely adopted models. The original COCOMO model was first published by Dr. Barry Boehm in 1981, and reflected the software development practices of the day. In recent year software development techniques changed dramatically. The changes and others began to make applying the original COCOMO model problematic. Company with the changes in professional software development practice that have come about since the 1970s result in the COCOMO II. This new, improved COCOMO is now ready to assist professional software cost estimators for many years to come.However, the related research show that the COCOMO also has its inherent limitation such as excessively dependence on the precision of the software scale etc. Because it is impossible to obtain a precise estimation of software scale in initial stage of the software development, the COCOMO has the certain indeterminacy inevitably. We present a cost estimation model F-COCOMO(Fuzzy-COCOMO) which is based on the basic COCOMO. In F-COCOMO, all inputs and outputs are viewed as fuzzy numbers for decreasing the dependency between the COCOMO and the scale, develop mode.At last, the precision of estimation is tested by a series of test being carried out in F-COCOMO. The result of the experiment confirms that FI-COCOMO behaves effectively in this aspect.