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In this paper we consider the problem of scheduling, on a two-machine flowshop, a set of unit-time operations subject to time delays with respect to the makespan. This problem is known to be x1d4a9;x1d4ab; -hard in the strong sense. We propose an algorithm based on a branch and bound enumeration scheme. This algorithm includes the implementation of new lower and upper bound procedures, and dominance rules. A computer simulation to measure the performance of the algorithm is provided for a wide...
This paper presents a heuristic approach combining constraint satisfaction, local search and a constructive optimization algorithm for a large-scale energy management and maintenance scheduling problem. The methodology shows how to successfully combine and orchestrate different types of algorithms and to produce competitive results. We also propose an efficient way to scale the method for huge instances. A large part of the presented work was done to compete in the ROADEF/EURO Challenge 2010, organized...
Various topics related to reverse logistics have been discussed
over the years. Most of them have assumed that facilities are kept
open once they are established, and no returned products or recovery
parts are stocked in intermediate recycling stations. However, firms
may have the right to repeatedly open or close their facilities
according to their economic benefits if they can acquire their
facilities by lease. It also turns out that intermediate recycling
stations like collection centers...
Various topics related to reverse logistics have been discussed
over the years. Most of them have assumed that facilities are kept
open once they are established, and no returned products or recovery
parts are stocked in intermediate recycling stations. However, firms
may have the right to repeatedly open or close their facilities
according to their economic benefits if they can acquire their
facilities by lease. It also turns out that intermediate recycling
stations like collection centers...
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