Architectural decisions affect the response of quality scenarios and the architect has to make suitable decisions which can help get desired and required responses. Since the decisions may frequently used by software architects for several systems, if such an architectural knowledge could be reused, architects can measure the effects of their decisions on quality attribute and they can share each other’s previous experiences. To do this significance, a support system can be helpful in order to facilitate decision making process. In this way, we propose a method for saving and restoring the experiences from systems developed earlier so that the knowledge of the software architects appeared to make the best possible decision for developing other systems. An ontology is introduced to specify the architectural decisions and their effects on quality scenarios. A database is created and a mining algorithm is conducted to extract quality responses corresponding to architectural decisions previously saved. Using the results from a number of previous systems to evaluate the proposed method, we compare the degree of estimated effects related to architectural decisions on response of various scenarios by this method with the estimates made by experts.