Analysis of VAN-Core System Architecture- A Case Study of Applying the ATAM

The architecture tradeoff analysis method (ATAM) is an architecture evaluation technique for analyzing risks, tradeoffs, and sensitivity points of architectures. In this paper we describe an experience of evaluating and improving the architecture of VAN-Core system which requires running 24 hours a day, 365 days a year, for online credit card transaction services. The goal of the architecture evaluation for VAN-Core system includes establishing risk mitigation strategies for identified risks and suggesting architecture improvements in addition to architecture evaluation.