ABSTRACT

Lifetime is a crucial quality characteristic of electronic products that must be monitored using control charts. Lifetime may provide right-censored data. A conditional expected value (CEV) x̄ control chart was developed to monitor type I right-censored data. Researchers had always assumed that the censored time is a known constant when designing control charts. This study provides an economic design model for optimizing CEV x̄ charts and type I right-censored time for reducing costs associated with quality control and life tests. This method was employed on a practical case of a liquid crystal display module. A sensitivity analysis was also conducted on the influence of the model parameters on the design and censored time of the CEV x̄ chart.

摘要

使用寿命是电子产品的一个关键质量特性，必须使用控制图进行监控。Lifetime 可以提供右删失数据。开发了条件期望值 (CEV) x̄ 控制图来监测 I 型右删失数据。研究人员在设计控制图时一直假设删失时间是一个已知常数。本研究提供了一种经济设计模型，用于优化 CEV x̄ 图和 I 型右删失时间，以降低与质量控制和寿命测试相关的成本。该方法用于液晶显示模块的实际案例。还对模型参数对 CEV x̄ 图的设计和截尾时间的影响进行了敏感性分析。