Requirements change management is a vital activity of the software development and even after maintenance. When we change one requirement it effects the other requirements of the system. A proper impact analysis maintains a repository of changing requirement, reusing previous experiences and reduces rework effort, is also essential for better requirement change management. There is also a need of a technique which improves requirement change management in a better way. In this paper, a model has been introduced which integrates Requirement Change Management and CBR (Case Based Reasoning) technique. Expert review method is used to evaluate our research. This frame work gives a better approach which manages requirement changes to the system. Our research outcome, i.e. the CBR technique used with the RCM, can provide a better approach to solve the issues of managing changes to the system. It maintains a repository by using CBR technique which is helpful to manage changes in future and we are able to solve the new change on the basis of previous experience.