This paper investigates two input-control strategies for flexible manufacturing systems (FMS). Under cyclic control, the FMS is dedicated to processing one part type at a time, in cyclic order. This strategy limits the variety of parts loaded to the machines at any time to one, and hence simplifies the flow pattern of jobs in the FMS. Another input-control strategy is to maintain a constant proportion of all part types in the family. This strategy leads to production smoothing, i.e., producing the same production mix for each item each day. Intuitively, this control strategy maximizes the flexibility of the machines and minimizes work-in-process. The authors evaluate the two input-control strategies from the production-inventory-control viewpoint applicable to the FMS operations.
