Research On Sotfware Estimation Method Based On The EAR Model

The content of software project estimation includes project workload,development time and cost. In the process of software project development, theproject estimation has been a very difficult but extremely important problem. Anaccurate estimation result is useful for the development team to develop a rationaland effective development plan, which plays a crucial role in the successfulcompletion of the project.On the basis of the capability maturity integration model of CMMI, the paperstudies the technology of software project estimation to meet the requirements ofCMMI level two and level three. Firstly, this paper has integrated analogy-basedestimation with Fuzzy numbers, proposed a new similarity measure and a newGeneralized Fuzzy Number Analogy Estimation (GFNAE) method based on Fuzzynumbers. Then, an Expert Analogy Review (EAR) model has been developed based onthe GFNAE method, expert judgment method and Project Evaluation and ReviewTechnique(PERT). Finally, mixing the EAR model and CMMI process area together, aestimate system of quantitative analysis has been set up, and achieve in the PPprocess domain of the CMMI.The CMMI management platform provides a complete quantitativemanagement solution for the implementation of software project estimation. It has agreat significance for the development of software project estimation.