Match-Up Strategies for Job Shop Rescheduling
We investigate the problem of integrating new rush orders into the current schedule of a real world job shop floor. Satisfactory rescheduling methods must keep stability of the shop, by introducing the fewest number of changes in the ordering of operations, while maintaining the same levels of the schedule performance criteria. This paper introduces a number of match-up strategies that modify only part of the schedule in order to accommodate new arriving jobs. These strategies are compared with the right-shift and the total-rescheduling methods, which are optimal regarding stability and performance, but ineffective for performance and stability, respectively. Statistical analysis indicates that the match-up strategies are comparable to right-shift for stability, and as good as total-rescheduling for performance.
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