In this paper, we proposed a supervisory control method for workflow nets. Workflow nets are a particular class of Petri nets, but have analysis techniques for more properties, e.g. logical correctness called soundness, than Petri nets. We tackled the...
In this paper, we proposed a supervisory control method for workflow nets. Workflow nets are a particular class of Petri nets, but have analysis techniques for more properties, e.g. logical correctness called soundness, than Petri nets. We tackled the following problem: Given a (plant) workflow net (NP ;M0P ) and a constraint specification, construct a workflow net (NS;M0S) which consists of NP and a (supervisory controller) Petri net NC which satisfies the constraint specification. We proposed (i) a sufficient condition for the existence of (NS;M0S) based on place-invariants, and (ii) a procedure to construct (NS;M0S). The advantage of our method is to enable us to take account of logical correctness which may be lost by supervisory control. We also illustrated the proposed method with an application example and showed its usefulness.