Job sequencing rules for minimizing the expected makespan in flexible machines

Article Abstract:

Job sequencing rules for a deteriorating flexible machine capable of processing a number of diverse jobs with negligible setup times between jobs are developed in such a way as to minimize expected makespan. Various jobs are allowed to contribute to machine deterioration at different failure rates, with these rates not required to remain constant with machine-use time. Results of simulation tests affirm the effectiveness of these job sequencing rules for different cases.

Electronic computers, Electronic Computer Manufacturing, Flexible Manufacturing Systems, Sequential analysis, Reliability (Engineering)

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Reacting in real-time to production contingencies in a capacitated flexible cell

Article Abstract:

A PC-based algorithm for the real-time resolution of production contingencies in a flexible, make-to-assemble manufacturing environment produces almost optimmum integer-valued solutions for all problems. Moreover, the algorithm resolves even vast 25-item 30-period problems in only several seconds. Using the algorithm, it should be feasible to assess the cost of each adjustment in real-time and choose if reacting in a batch manner may be more beneficial.

Prepackaged software, Production Mgmt NEC, Production management, Manufacturing industry, Manufacturing industries, Usage, Real-time programming, Real time programming

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Impact of job-sequence on the down-time of a deteriorating flexible machine

Article Abstract:

Several branch-and-bound algorithms have been developed for evaluating the relationship between job-sequencing and the down-time of a deteriorating flexible machine with a limited tool-magazine capacity. The algorithms were used in three different application scenarios involving a faulty machine. Results indicate that the proposed algorithms are capable of providing real-time support for minimizing machine-down time and optimizing job-sequencing.

Management, Human-machine systems

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