Note—Operations Sequencing in Discrete Parts Manufacturing

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Abstract
This paper presents an algorithm for efficiently sequencing the cutting operations associated with the manufacture of discrete parts on a CNC machine. The problem is first modeled as an integer program but recast via Lagrangian relaxation as a min-cut problem on a bipartite network. Tight lower bounds are obtained with a max-flow algorithm. The corresponding solution is used as input to a greedy heuristic which generates “good” feasible points. Given nonconvergence, a branch and bound strategy is used to find the optimal solution.

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