Over the years, SDC has been assisting the U.S. Postal Service to improve the efficiency of its operations. By constructing computer models of their mail sorting facilities and local post offices, we've been able to demonstrate to the Postal Service the benefits of improved scheduling of its various workforces and the impact of increased workforce flexibility.
Where viable Postal Service models already existed, we incorporated them, such as the Advanced Workforce Planning System (AWPS) which describes the mail distribution work requirements in the "back-room" of a post office. Similarly, where available SDC models could be applied, we integrated them, such as SwiftLine ?, which measures retail lobby queueing and schedules the window clerks. Where there were no existing models to draw from, we invented them.
Among the models we developed is one we refer to as the, "Front-Room, Back-Room Model". This unique queueing model determines the efficiency gains that result from two management strategies: first, shifting window clerks from waiting on retail customers to distributing mail when there are no waiting lines; and second, bringing distribution clerks from the back room to the retail lobby when the lines lengthen.
Based on SDC's modeling analyses, the Postal Service has been able to achieve substantial savings.
Modeling Postal Operations: Logic Flow