Abstract: Architecture evaluation for a large system can be done by using an approach called Architecture Tradeoff Analysis Method (ATAM). In large system the achievement of quality attributes such as maintainability, reusability, extensibility, scalability and Stake Holders Expects (SHE) are not full filled in ATAM approach. This study, presents a system which uses ATAM and design patterns for evaluating the software architecture to identify risk factor and check all the quality attributes have been addressed in the software. By combining the design patterns and the ATAM approach for the evaluation of the software architecture would result in better solutions.