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Deadlock avoidance for manufacturing systems with partially ordered process plans

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2 Author(s)
Sulistyono, W. ; Sch. of Ind. Eng., Purdue Univ., West Lafayette, IN, USA ; Lawley, M.A.

Most deadlock avoidance work in manufacturing deals with systems where each part type requires a fixed sequence of operations. In contrast, the paper deals with those systems that support sequencing flexibility, that is, the operations required by the part are partially ordered. In this setting, the order in which operations are performed is not predetermined but becomes a real-time decision. Specifically, the paper presents a detailed resource allocation model and proves the NP-completeness of optimal deadlock avoidance for a highly flexible subclass of these systems. It also identifies several cases and conditions for which optimal deadlock avoidance is of polynomial complexity

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Robotics and Automation, IEEE Transactions on  (Volume:17 ,  Issue: 6 )