Abstract
In this paper, a cyclic scheduling problem in a flow-shop network including a robot and several machines is studied. The cyclic scheduling problem deals with the planning of operations that have to be repeated in a timely fashion infinitely often. Obtaining the optimal schedule is an NP-hard problem in general. It is proven that the optimal schedule is always among a limited number of schedules known as 1-unit cycles for up to three machines in a flow-shop network. This paper proves that the optimal cycle is a 1-unit cycle for an arbitrary number of machines.
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