The process area, Verification (VER) and Validation (VAL) are the levels of CMMI specification, mandates the usage of testing management activities.  Every software project is having different testing activity phases in software development life cycle. We do different testing activitiesin each of testing phase are called Unit Testing, Functional Testing/Integration Testing, Performance Testing, Load testing, System Testing/Regression Testing and Customer Acceptance Testing.    Testing team develop several test cases to execute testing activities at each testing phase.Project Manager or Test Manager wants to manage these activities in effective way with an aim of  delivering the projects with good quality.