Operation Management Essay

4721 Words Dec 19th, 2014 19 Pages
Backward Scheduling – An effective way of scheduling Warehouse activities

Traditionally, scheduling algorithms were used in capital intensive production processes where there was a need to optimize the production because the plant capacity was constrained and there were different lines of products vying for the same manufacturing plant resources. With warehouse operations getting more complex and automated over the years, a similar need is felt to schedule some of the warehouse jobs using these algorithms to optimize the use of resources such as cranes, conveyors, labelers and pickers deployed in the warehouse to maximize the throughput. This paper describes the approach of one of the scheduling a l g o r i t h m s c a l l e d “ B a c k
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Backward Scheduling – An effective way of scheduling Warehouse activities

Table of Contents
1. Introduction 2. Types Of Scheduling Algorithms 3. What Is Backward Scheduling? 4. Using Backward Scheduling In Warehouse Operations How Backward Scheduling Is Done? Preparatory Steps Backward Scheduling Algorithm Steps 5. Variants Of Backward Scheduling 6. Advantages Of Using Backward Scheduling 7. Conclusion 8. References 4 4 5 5 5 5 6 11 11 12 12


Backward Scheduling – An effective way of scheduling Warehouse activities

To schedule and release orders for picking, warehouses generally use a concept of “Wave Planning”. In Wave planning, the full day's picking load is calculated a day in advance and then is spread across different “Waves” or “Batches”. Individual waves are then released and processed sequentially with a fixed time schedule, during which picking takes place in different pick areas of the warehouse. The disadvantage of using this “Wave” concept is that since the waves are processed sequentially, a new wave is released only when picking planned in a previous wave has finished. This means that a picking delay in one area will make the areas that have finished their picking job out of work as picking for next wave cannot be started. Moreover, since the wave release time is not dependent on the release time of the truck carrying goods to customer, delays are

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