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Selection of Scheduling Schemes Based On AHP and Simulation Modelling

Ratheesh. K, Udayakumar. P, Udhayakumar. C

The role of scheduling in manufacturing systems has become very important, especially in today’s competitive industrial environment, which calls for time and cost effective production systems. Production scheduling is one of the most difficult tasks to be carried out within this environment: of its customers which would lead to increased competitiveness and profitability. Finally, given the fact that manufacturing activities are often characterized by significant stochastic and dynamic attributes, it is not surprising that the scheduling domain remains one of the hottest issues. On the other hand, technology progresses with the same pace as industrial systems do, and various methodologies and techniques have been adopted to solve scheduling problems. The problems related with scheduling lead to frequent revision of schedules that have already being dispatched on the production floor. First, the performance that a schedule exhibits usually is being measured based on a single criterion. However, manufacturing performance is multi-dimensional, and targets may even conflict with each other. Therefore, schedules have to be revised in order to comply with criteria which initially were not taken into consideration. Second, schedules are rarely evaluated before they are dispatched on the production floor, despite the fact that there is existing technology which allows that. This paper suggests a new methodology in evaluating the scheduling schemes. Instead of the old methodology, a new hybrid technique is proposed.