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A column generation algorithm for the Buffer Allocation Problem approximated by the Time Buffer concept

机译:通过时间缓冲区概念近似的缓冲区分配问题的列生成算法

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摘要

The Buffer Allocation Problem deals with buffer sizing in production systems. In particular, the objective is to find an optimal buffer size configuration achieving some target performance measure. It has two main tasks to accomplish: searching for an optimal system configuration and assessing the system performance. In real setting, simulation-optimization is the common technique to approach this problem. Recently, an approximated mathematical programming approach has been developed for BAP simulation-optimization. The approximation consists in modeling queues with temporal lags (time buffer) and allows to devise Linear Programming (LP) instead of Mixed Integer Linear Programming (MILP) models. This latter makes easier the solution process, which remains a challenge due to the models huge and complex dimension solution space topology. In this paper, we propose an exact method for the solution of the time buffer approximated BAP. Tests on randomly generated instances showed that the proposed method is computationally more efficient than standard LP solver in most of the cases.
机译:缓冲区分配问题涉及生产系统中缓冲区的大小。特别地,目标是找到实现某些目标性能指标的最佳缓冲区大小配置。它有两项主要任务要完成:寻找最佳的系统配置和评估系统性能。在实际环境中,模拟优化是解决此问题的常用技术。最近,已经开发出一种近似的数学编程方法来进行BAP仿真优化。近似包括使用时间滞后(时间缓冲区)对队列建模,并允许设计线性规划(LP)而不是混合整数线性规划(MILP)模型。后者使求解过程更容易,由于模型巨大且复杂的维解空间拓扑,因此仍然是一个挑战。在本文中,我们提出了一种解决时间缓冲区近似BAP的精确方法。对随机生成的实例进行的测试表明,在大多数情况下,该方法在计算上比标准LP解算器更有效。

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