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Our incentive is to assess the impact of demand forecast errors on the cost performance of several lot-sizing techniques in a multi-level context. Unpredicted changes in demand keep on plaguing consumer product companies. However, efforts to improve demand forecast accuracy may not be rewarded...
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We consider a novel generalization of the resource-constrained project scheduling problem (RCPSP). Unlike many established approaches for the RCPSP that aim to minimize the makespan of the project for given static capacity constraints, we consider the important real-life aspect that capacity...
Persistent link: https://www.econbiz.de/10011655297
We investigate a periodic inventory system for a single item with stochastic demand and random yield. Since the optimal policy for such a system is complicated we study the class of stationary linear-inflation policies where orders are only placed if the inventory position is below a critical...
Persistent link: https://www.econbiz.de/10010643235
This paper presents an Optimised Search Heuristic that combines a tabu search method with the verification of violated valid inequalities. The solution delivered by the tabu search is partially destroyed by a randomised greedy procedure, and then the valid inequalities are used to guide the...
Persistent link: https://www.econbiz.de/10014047155
Part-orienting systems are employed in many manufacturing environments to feed work parts in correct orientation for proper operations. A part-orienting system is a serial arrangement of orienting devices; the selection and ordering of these devices is an important design aspect that is...
Persistent link: https://www.econbiz.de/10014218554
US by 67 percent and 30 percent, respectively. We suggest two simple dynamic heuristic heuristics that continuously … problem. We show through a numerical study that the revenue impact of using these dynamic pricing heuristics rather than fixed … pricing heuristics persist under a periodic setting. This is especially true for the revenue approximation heuristic for which …
Persistent link: https://www.econbiz.de/10013036758
decade, meta-heuristics such as tabu search, genetic algorithms and simulated annealing, have become popular and efficient … tools for solving hard combinational optimization problems. We review the various meta-heuristics that have been …, cutting planes, Dantzig-Wolfe decomposition, Lagrange relaxation and dedicated heuristics. This allows us to compare these …
Persistent link: https://www.econbiz.de/10014028899
We establish the computational complexity of the problem of minimizing makespan in a flowshop, where each jobs requires a pallet the entire time, from the start of its first operation until the completion of the last operation. We prove that the problem is NP-hard in the strong sense for m =2...
Persistent link: https://www.econbiz.de/10013152472