Optimal Worker Assignment under Limited-Cycled Model with Multiple Periods - Consecutive Delay Times is Limited

Abstract

Strictly keep delivery date is the life of the manufacturing enterprise indefinitely. Especially in the developing countries such as China, labor-intensive enterprise is still the mainstay industry. As a result, assembly line is widely used as a manufacturing process for reducing costs and production time. However, laborer is the main factor of production speed in such a labor-intensive enterprise. So because of the various working capacity of worker, one work process may delay or idle, and this will influence the rear several processes. This unforeseeable consecutive delay of process may influence the whole manufacturing production. So we build a model, called as limited- cycled model with multiple periods (LCMwMP), to assume evaluating the influence risk. In order to minimize the risk, the assignment of the workers, especially untrained worker is focused on. In previous researches, rules of optimal worker assignment with two kinds of workers were proposed in which one, two and three untrained workers exist. As it is, the non-limited consecutive delay time is not allowed in the fact world. In this paper, we deal with an assembly line as LCMwMP model when there are two kinds of workers, who are distinguished by worker's efficiency. We consider an optimization problem with three untrained workers, specially consider limited consecutive delay times as twice or three times, for comparing with the previous research in which consecutive delay times is not limited. And, by some numeral experiments, we will conclude several rules of optimal assignment.