A quantitative model for the evaluation of reengineering risk in infrastructure perspective of legacy system

Competitive business environment wants to revolutionize existing legacy system in to self-adaptive ones. Nowadays legacy system reengineering has emerged as a well-known system renovation technique. Reengineering rapidly replace legacy development for keeping up with modern business and user requirements. However renovation of legacy system through reengineering is a risky and error-prone mission due to widespread changes it requires in the majority of case. Quantifiable risk measures are necessary for the measurement of reengineering risk to take decision about when the modernization of legacy system through reengineering is successful. We present a quantifiable measurement model to measure comprehensive impact of different reengineering risk arises from infrastructure perspective of legacy system. The model consists of five reengineering risk component, including Deployment Risk, Organizational Risk, Resource Risk, Development Process Risk and Personal Risk component. The results of proposed measurement model provide guidance to take decision about the evolution of a legacy system through reengineering.