Points of Difference Between Regression Testing and Functional Testing Daily Batch Processing is a series of mainframe tasks used by a financial institution daily to reunite day to day client dealings. B is a GUI (Graphical User Interface) program which is used by financial institution workers to evaluation dealings of financial records as per client concerns. C is a GUI (Graphical User Interface) program which is used by financial institution workers to evaluation dealings of bank card records as per client concerns. Assume that all tasks in batch processing relevant to programs B, C and L are connected each other.