Abstract
An agile development method has been attracted attention as new software development method in current few years in Japan. However the ratio of implementation has been lower than in US and Western countries because Water whole method has been a mature development method in Japan. The main reason should be the difficulties of way of estimation and related the contract due to the difficulties of initial planning for acceptance of changes in the project. In this research, we focus the processes and methods of estimation for Agile Development to make sure the advantages, disadvantages and the requirements when they are used for. This research shows an effective and dependable way of estimation for agile development with correlation and regression analysis of story point and actual working time based on real data of projects of an IT company who think agile development as a business strategy. It aims to reduce the uncertainty of time, quality and cost by using this estimation method for expanding the use of an agile development.
