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Chinese Journal of Management Science ›› 2023, Vol. 31 ›› Issue (10): 187-192.doi: 10.16381/j.cnki.issn1003-207x.2020.2162

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Minmax Scheduling with Deterioration Effects and Common Due-window on a Single Machine

Jing XUE,Ji-bo WANG()   

  1. School of Science,Shenyang Aerospace University,Shenyang 110136,China
  • Received:2020-11-18 Revised:2021-01-26 Online:2023-10-15 Published:2023-11-03
  • Contact: Ji-bo WANG E-mail:jibo75@163.com

Abstract:

Scheduling problems with deterioration effects (time-dependent processing times) have received increasing attention nowadays. In a real production environment, the processing time of each job often depends on its starting time, for example, a processing machine or a tool loses its qualities, i.e., the later of a job starts, the longer it takes to process it, which is deterioration effect. In this paper, on one hand, the single machine scheduling problem is studied with a time-dependent deterioration model: the processing time of a job is proportional to its starting time, i.e.,pj=aj(A+Bsj), wherepjsjaj represent respectively, the actual processing time, starting time and deteriorating rate of the job Jj, while A and B are given positive constants.On the other hand, under the Just-In-Time (JIT) system, jobs are required to be completed as close as possible to their assigned due-windows, otherwise, earliness or tardiness penalty would be incurred. Under common due-window put forward in this paper, the cost function is composed of earliness penalty, tardiness penalty, due-window starting time and size. The goal is to determine the starting time of the first job, schedule of jobs, due-window starting time and size so that the maximum cost function is minimized. It is showed that this minmax problem can be modeled by a linear programming. Some properties of the optimal solution are analyzed, which proved that the problem can be solved in polynomial time O(n), where n is the number of jobs. Furthermore, a numerical example is given and the optimal solutions under different conditions are analyzed.Single machine minmax scheduling problem with deterioration effect and common due-window can impact the order in which the jobs are processed and thus affect production decisions. Therefore, it needs to take deterioration effect and due-window into consideration when making production decisions, and how to enhance production efficiency.

Key words: scheduling, minmax, due-window assignment, deterioration effect

CLC Number: