Application Service Maintenance(ASM) projects mainly use Activity-Based software estimation methodology compared to Function Point or Lines of Code Estimation methodologies[1]. This is due to the nature of execution of ASM Projects differ with nature of execution of development projects. Activity based estimation methodology breaks estimation at each sub activities level of Software Development Life Cycle(SDLC) using work break down structure. Prediction of effort for each micro level activities of SDLC is really challenging one. Regression Analysis has been done for the data collected for some Enhancements of ASM projects. This paper explains how to predict the estimation for each micro level activities of SDLC by statistical analysis using Regression Approach. Keywords : Software Estimation , Regression,
M. J. Basavaraj, K. C. Shet