Optimal production policies for multi-stage systems with setup costs and uncertain capacities

Article Abstract:

A production planning model is developed for a multi-stage serial production system with uncertain aggregate production capacity at each stage. The study seeks to determine the relation between capacity uncertainties and production decisions in such a setting. A simple two-critical number production policy for each stage is demonstrated to be optimal. It is shown that, when the available input goes beyond the lower critical number, there is a tendency to bolster production as much as possible but not to the point of exceeding the upper critical number. The critical numbers for successive stages are found to be monotonic, which suggests that the lower critical numbers can be used to effectively control production for all the stages, except the first stage.

Methods, Management, Manufacturing processes, Manufacturing, Production management, Industrial capacity

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Optimizing a ring-based private line telecommunication network using Tabu search

Article Abstract:

A study was conducted to analyze the problem of optimizing a ring-based private line telecommunications network. A Tabu search technique was utilized to carry out the analysis. It supported probabilistic move selections, long term memory and candidate list strategies. Moreover, the method integrated hierarchical move evaluation and an elite solution recovery scheme. Computations were carried out on small size random problems and larger problem instances. Results indicated that the Tabu Search heuristic can effectively determine optimal solutions for all test problems which can be solved by a branch-and-cut algorithm. In addition, the algorithm outperforms the best local search heuristic available.

Communications Equipment, Telecommunications Equipment, Communications Equipment Manufacturing, Information Systems & Theory, Research, Telecommunications systems, Design and construction, Algorithms, Telecommunication systems, Heuristic programming

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