Quality Control Program is the set of activities that control the quality of the service that is being provided and identifying any deficiencies that might be present.
Quality control process is a corrective process. The task of actual testing our performance to find out and identify non compliance present in the service that is being provided by the delivery team. The deficiencies are raised to the management and the delivery team who then try to fix them.
After fixes, the service is verified again such as completion of the report and that features are working as required. QC process assures that the service being provided is have the required quality.
QC focuses on the improvement of the service by identifying the deficiencies and issues to make sure that we are complying with the scope and customer requirements.