Multi-stage production with variable lot sizes and transportation of partial lots

Optimal Lot Sizes with Geometric Production Yield and Rigid Demand

Optimizing Multi-Stage Production with Constant Lot Size and Varying Numbers of Batches

The model presented in this paper assumes that a uniform lot size is produced through a series of manufacturing stages, with a single set-up mud without interruption at each stage. Transportation of partial lots, called batches, is allowed between stages after the whole batch is completed. The batch sizes must he equal at any particular stage, but the optimal number of equal-sized batches may d...

Multi-item dynamic lot-sizing with delayed transportation policy

We optimize ordering and inbound shipment decisions for a manufacturer that sources multiple items from a single supplier. The objective is to satisfy the requirements in the production plan with minimum transportation and inventory holding costs over a multi-period planning horizon. Transportation costs are charged to the manufacturer on a per truck shipment basis. We investigate the option of...

A Markov Model to Determine Optimal Equipment Adjustment in Multi-stage Production Systems Considering Variable Cost

Our aim is to maximize expected profit per item of a multi-stage production system by determining best adjustment points of the equipments used based on technical product specifications defined by designer. In this system, the quality characteristics of items produced should be within lower and higher tolerance limits. When a quality characteristic of an item either falls beneath the lower li...

Combination of Genetic Algorithm With Lagrange Multipliers For Lot-Size Determination in Capacity Constrained Multi-Period, Multi-Product and Multi-Stage Problems

 Abstract : In this paper a meta-heuristic approach has been presented to solve lot-size determination problems in a complex multi-stage production planning problems with production capacity constraint. This type of problems has multiple products with sequential production processes which are manufactured in different periods to meet customer’s demand. By determining the decision variables, mac...