Manage Requirement Identify inconsitency Output: BRS: Business Requirements Spec SRS: System Requirements Spec RTM: Requirements Traceability Matrix 需求跟踪矩阵      Business ReqId,UserCaseId,SystemRequirementId,HighLevelDesign Id(SA),LowLevelDesineId,BuildNo,ReleaseId      开发需求时需要为每个需求编号，这样需求跟踪矩阵中对ReqId, UsercaseId,buildno可以更好的跟踪。因为后面buildno（No格式）中可能包括reqId. CR: Change Request PR: Problem Request CCB: Change Control Board