MIP-Heuristics for the Capacitated Lot-Sizing with Hybrid Flow Shop Integration
Abstract
This paper proposes a two-phase approach to integrating the capacitated lot-sizing (CLSP) and hybrid flow shop (HFS). First, we construct an initial solution exploring three heuristics: relax-and-fix, LP-and-fix, and greedy. Next, we try to improve the initial solution through a fix-and-optimize heuristic that decomposes the original MIP per period. Numerical experiments show that combining the greedy heuristic with fix-and-optimize can overcome the alternatives, obtaining small gaps for most cases, even for large-size instances.
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