I m facing a Problem of managing Test Cases in a Project which is in Maintainanace Phase. After completing all Test cases w.r.t Requirement or after all the requirement implemented most of the time client request for some new changes in the requirement then we again need to Change all Test Cases and FRS and even the developers need to Re-Implement the changes. Sometimes client changes requirement with Form & Page Layout. Due to this we get delay in the execution. How could i control all Changes and avoid rework.