A new concept of job shop scheduling system - hierarchical decision model

Article Abstract:

Scheduling is concerned with the on-time delivering of products ordered by a customer. In a job shop, production starts when a customer order arrives and ends when the product is completed. Therefore, the time period between the arrival of the customer order and the completion of the product falls under the job shop scheduling system. However, the present concept of a job shop scheduling system is inadequate. To help resolve this problem, a new job shop scheduling system based on the five decision systems of order entry, master scheduling, job scheduling, operation scheduling and dispatching is proposed.

Management

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Simulated annealing approach for minimizing the makespan of the general job-shop

Article Abstract:

A simulated annealing algorithm is proposed for minimizing the makespan of job-shop scheduling. The basic premise of the proposed approach is based on the rescheduling activity of the human scheduler, which often finds a better schedule by modifying its operation sequence. The simulated annealing approach avoids local minimum states, and computational results demonstrate the effectiveness of this method in minimizing the makespan of the general job-shop.

Production Planning & Control, Usage, Production control, Production planning, Simulated annealing (Mathematics)

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Bi-criteria scheduling problem on three identical parallel machines

Article Abstract:

A bi-criteria scheduling problem is considered using the Sahni's algorithm for three identical parallel machines. Two and three identical parallel machine scheduling problems are solved to simultaneously minimize two criteria, maximum completion time and maximum lateness. Numerical results show that nondominated solution points are located on line segments and that the decision maker chooses a pair to formulate a feasible schedule.

Shop mathematics

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