Postal Control Systems As A mail processing clerk for the U.S Postal Service, my success is measured by two indicators, the amount of mail volume left on hand at the end of each day and the number of dispatches that leave the building on time. If the dispatches to the stations leave on time and I have a limited amount of mail volume left on hand my day has been a success. Through this paper I will discuss the control systems used to ensure that success. At the end of the day there is only one indicator that determines organizational success or failure, a happy and satisfied customer.