A Study of Next Station Selection Rule for FMS Scheduling against Duedate

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Due-date is an important factor in Flexible Manufacturing Systems scheduling. Even though most of research have focused part selection and loading problem by fixed due-date assignment rule, but FMSs consist of multi-function machines which facilitate alternative processes. This paper investigates interactions of five dispatching mechanisms, three NSS (Next Station Selection) rules and a dynamic duedate assignment rule (TEFS)-using simulation. This research considers cost based and time based performance measures : total cost (tardy penalty cost and early goods holding cost), mean flow time, mean tadiness, percentage of tardy jobs, and queue lengths. In addition, we have applied the alternative machines based NSS rules and dynamic duedate assignment rule to a real FMS factory.