有限时间过程Vp控制图的经济与统计设计

Economic and statistical design of Vp control charts for finite-horizon processes

IISE Transactions · 2016
被引 18
ABS 3

中文导读

针对生产时间有限的制造过程,提出一种马尔可夫链模型来设计自适应Shewhart控制图,以精确计算统计性能指标和监控运营的预期成本,帮助减少废品和返工成本。

Abstract

In manufacturing environments where the production horizon for a specific product can be limited to a few hours or shifts, statistical process monitoring based on control charts is strategic to cut scrap, rework costs, and meet due dates. In this article, a Markov chain model is proposed to design a fully adaptive Shewhart control chart in a process with finite production horizon. The proposed Markov chain model allows the exact computation of several statistical performance metrics, as well as the expected cost of the monitoring and operation process for any adaptive Shewhart control chart with an unknown but finite number of inspections. Illustrative examples show the implementation of the Vp chart in short runs producing a finite batch of products.

统计过程控制控制图马尔可夫链生产管理质量控制