Economic design of a CEV x control chart for determining optimal right-censored times

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) x 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 x 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 x chart.

Automated summary

Lifetime is a crucial quality characteristic of electronic products that can be monitored using control charts, with right-censored data often being provided. A conditional expected value (CEV) x control chart has been developed for this purpose, with an economic design model offered to optimize costs associated with quality control. This method has been applied to a practical case involving a liquid crystal display module, with a sensitivity analysis conducted on the influence of model parameters on the design and censored time of the CEV x chart.