Entropy-Based Model for Measuring Risk of Requirement Changes

Software projects face a common problem is the requirement uncertainty and frequent requirement changes. The risk of requirement changes is considerable risk in software project management. Information entropy can effectively measure subsystem´s degree of uniformity. This paper proposes a quantitative risk measurement model that could be used to measure risk posed by requirement changes. The more uniform requirement impact on software project, the smaller the risk, otherwise the key requirement changes will have a significant impact on the project. This paper discusses the rationality of the model and gives an instance of this model. The model requires data can be obtained from enterprise. Experiments show that the model is scientific and rational. It can serve as a reference for requirement management.