The software estimation dilemma, a small step forward

The EEM (Effort Estimation Model) for software development is a support system to assist in the process of economic evaluation of software projects that takes place when a project is about to start. At that point the estimates are done only at a low level of precision, to enable the management to determine project feasibility. The EEM uses techniques consistent with the level of knowledge generally available in the organization at that time. Estimates for the effort required at the later stages of the software development life cycle are done in a detailed form, using differential techniques, towards the end of the requirement analysis and the preliminary design stages. Different estimating approaches can be used at the different points in the system development process. A prototype was developed based on these principles and has been working for the last 18 months. This report discusses the underlying assumptions, concepts and process involved