Volume 2 Issue 3 pp. 583-592 Summer, 2011


Simple assembly line balancing problem under task deterioration


M. Emrani Noushabadi, U. Bahalke, K. Dolatkhahi, S. Dolatkhahi and A. Makui


This paper introduces the effect of task deterioration in simple assembly line balancing problem. In many realistic assembly lines, a deterioration task is considered when a task is started earlier than the assigned time since the station time is constant and the earliness of the task does not reduce the cycle time. This phenomenon is known as deteriorating tasks. Therefore, we seek an optimal assignment and schedule of tasks in workstations, in order to minimize the number of stations for a given cycle time, which is known as SALBP-1. For this purpose, a mathematical model is proposed. Since the pure SALBP-1 is proved to be NP-hard and considering task deterioration complicates problem further, we propose a genetic algorithm for solving such problem. Several well-known test problems are solved to study the performance of the proposed approach.


DOI: 10.5267/j.ijiec.2011.02.003

Keywords: Assembly line balancing Scheduling, Task deterioration, Genetic algorithm
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