Principles of Effort and Cost Estimation

Abstract

One of the reasons for failed estimates is an insufficient background of estimators in the area of software estimation. Arbitrary selection and the blind usage of estimation methods and tools often lead to disappointing outcomes, while the underlying reasons remain unclear. In discussions with corporate management, it is not uncommon to hear the phrase “think of a number and multiply by three.” Deliberate decisions regarding the particular estimation method and its knowledgeable use require insight into the principles of effort estimation.