Comparison of Dispatching Rules for Semicondutor Manufacturing Using Large Facility Models
نویسندگان
چکیده
In this paper, we present a comparison of five dispatching rules that aim to reduce the mean and the variance of cycle times. The performance of the dispatch rules is evaluated using simulation results for two large semiconductor wafer fabrication facilities. The results show that which dispatch rule achieves the best results depends on the fab, on the load of the fab and on the product.
منابع مشابه
Flexible Manufacturing System Scheduling Using Hybrid Petri Nets with Dispatching Rules
Flexible manufacturing systems (FMSs) are advanced and highly integrated manufacturing systems consisting of robots, machining cells, and automated guided vehicles (AGVs) that function under the hierarchical control of computers. The relations between its components are very complex. Scheduling in FMS is an intricate phenomenon owing to the large variability in the operating parameters. Schedul...
متن کاملComparison of Due-date Oriented Dispatch Rules in Semiconductor Manufacturing
In this study we compare the cycle-time and on-time-delivery performance of the Critical Ratio (CR), the Earliest Due Date (EDD), and the Operation Due Date (ODD) dispatching rules in semiconductor wafer manufacturing. In addition, we comment on the robustness of the rules to low target flow factor values. It turns out that EDD has almost no positive effect on on-time delivery compared to First...
متن کاملOn-line Deadlock Avoidance for Complex Routing Flexible Manufacturing Cells
The time for electronically connecting business and manufacturing has come. Advancements in e-commerce have requested that business decisions on web be the direct driving info to the corresponding manufacturing activities without human interventions. Since orders from the web may arrive in random sequence and with a range of specifications, flexible manufacturing systems (FMS) may be the proper...
متن کاملPerformance Evaluation of Contract Net - BasedHeterarchical Scheduling for
This paper presents a heterarchical scheduling approach for exible manufacturing systems. The approach adopts a multiagent cooperative problem solving paradigm by using a bidding mechanism based on the contract net protocol to generate the production plan and schedule. Overall, scheduling is implemented using a Production Reservation approach. A typical job shop testbed demonstrates the eeectiv...
متن کاملA comparison of machine-learning algorithms for dynamic scheduling of flexible manufacturing systems
Dispatching rules are frequently used to schedule jobs in flexible manufacturing systems (FMSs) dynamically. A drawback, however, to using dispatching rules is that their performance is dependent on the state of the system, but no single rule exists that is superior to all the others for all the possible states the system might be in. This drawback would be eliminated if the best rule for each ...
متن کامل