The quality management plan is also an important part of DDP. The purpose of the quality management plan is to describe how quality will be managed throughout the lifecycle of the product. It also includes processes and procedure ensuring quality planning,assurance,and control are all conducted.The quality management plan creates a method for periodic review and improvement including how to handle corrective action when something goes wrong to deal with problems as well as prevent repeat occurrence . It ensures increased revenues and productivity of an organization. In order to meet customer expectation the quality management plan should be effective.