Carrier Sorting Plan and Rate of Letter in Postal Logistic

It is important to have the accuracy sorting plan for the save of postman work time and the fast delivery of the receipt mail. It's also very important to plan the proper carrier sorting plan at the situation where the number of pocket of letter sorting machine [LSM] is less than the number of postal code or the number of carrier. This paper describes the method for the carrier sorting plan and sorting rate improvement at the situation where the number of pocket of LSM is small. The sorting rate improvement effect more than 20% was showed by applying the proposed carrier sorting plan to 2 areas.