Abstract

The problem under consideration is the cost estimation and consequent bid preparation for machined parts subcontracted to mechanical SMEs. The system is based (i) on a manufacturing feature based product description of the part to be machined and (ii) on a non-linear model of its process plan using Petri nets, taking into consideration processing alternatives and precedence constraints. In this paper, a particular matrix implementation of our Petri net representation is described and demonstrated. Minimum time or cost process plans are obtained through simulation of the firing of the Petri net model, in its matrix form, with machining heuristics.

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