Solving multi-item lot-sizing problems using strong cutting planes
Management Science
A practical approach to recipe improvement and optimization in the batch processing industry
Computers in Industry - Special issue on computer integrated manufacturing in the process industries (I-CIMPRO)
A Dynamic Lot-Sizing Model with Demand Time Windows
Management Science
Using tabu search with ranking candidate list to solve production planning problems with setups
Computers and Industrial Engineering
A neural network approach to the selection of feed mix in the feed industry
Computers and Electronics in Agriculture
Dynamic lot-sizing model with demand time windows and speculative cost structure
Operations Research Letters
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Due to the pressure to become more competitive, feed mills coordinate closely with their suppliers and customers by forward purchasing raw materials and integrating with downstream units such as animal producers. To integrate downstream units and forward purchase raw materials, the mill must explore new paradigms for managing integrated information. The close relationship between customers, suppliers and the feed mill allows the feed manager to access information that was not previously available, such as the price of raw materials and the demand for feed products, which creates a more deterministic environment. In the present study, to exploit information from the integration of production units, an extended planning horizon was evaluated by developing a mathematical model and a heuristic algorithm for multiple period planning. The simulated results indicated that feed mills are likely to benefit from expanding the planning horizon. On average, the costs obtained from multiple-period planning were approximately 2.55% lower than those of single-period planning. Moreover, because recipe costs fluctuate dramatically, mills benefit from multiple-period planning by accounting for variations in recipe costs. However, the savings of multiple period planning are limited by other factors such as inventory holding costs and the warehouse inventory of the feed mill.