A Critical Chain Buffer Setting Method Based on Production Uncertainty

Abstract

The invention discloses a key chain buffer setting method based on production uncertainty. The present invention first obtains the priority coefficient of the customer and the priority coefficient of the order, and then uses a heuristic algorithm to generate a dispatch plan based on the priority rule, and then performs left and right shift operations on the obtained dispatch plan to obtain two new dispatch plans, And compare the start time of each process to obtain the free time difference of each process, then the process with a free time difference of zero is the critical chain process, so as to obtain the critical chain, and then set the input, project and resource based on the free time difference and the improved root variance method The buffer size of the buffer. The invention improves the root variance method by combining resource utilization and variability measurement, and corrects the root variance method by accurately measuring the variability of process processing time for the problem of the influence of a large number of uncertain factors on buffer calculation in complex production environments The calculation result effectively improves the accuracy of the buffer calculation.

Description

technical field [0001] The invention belongs to the technical field of critical chains, in particular to an improved buffer setting method for critical chains facing production uncertainty. Background technique [0002] Researching scientific and effective production scheduling control algorithms and developing a practical and stable production scheduling management system have become the urgent needs of manufacturing enterprises. Traditional production scheduling methods have insufficient research on the impact of variability on the production process. Most of the research results focus on scheduling strategies, bottleneck control, equipment load allocation, and task assignment. The production line is used as a whole to evaluate the production cycle and production rate. And the overall performance of the WIP, and then quantify the uncertainties and study their impact on the performance of the manufacturing system. [0003] Critical chain has been widely used in the field o...

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Problems solved by technology

[0005] The present invention aims at technical problems such as the impact of a large number of uncertain factors on buffer settings in a complex production environment when the critical chain is applied to production scheduling, and proposes a method of improving the root variance method through the variability theory of factory physics to control the production of the critical chain. Scheduling is a processing method for buffer setting, thereby improving the ability of the production scheduling method to improve the production performance of the enterprise

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