Abstract: “Accurate software estimation such as effort and cost estimation is a typical process and is a major issues in software project development. Estimation of software project effort and cost are very essential and necessary to improve software management decision.software estimation consist many estimation like cost estimation, quality estimation, effort estimation and risk analysis.This paper is confined on effort estimation based on fuzzy empirical model. Many empirical model were used in early da”

Keywords: Software estimation , Walston – Felix Model , Bailey – Basili Model , Boehm Simple Model , Fuzzy Logic,KLOC.