Performance characteristics of rules for internal quality control: probabilities for false rejection and error detection.

摘要: When assessing the performance of an internal quality control system, it is useful to determine probability for false rejections (pfr) and error detection (ped). These characteristics are estimated here by use a computer stimulation procedure. The rules studied include those commonly employed with Shewhart-type charts, cumulative sum rule, applicable when series measurements treated as single observation. situations increase in random error, systematic shift, drift, mixtures these. very dependent on number observations choice rules. No one rule best detecting all errors, thus combinations desirable. Some appropriate suggested their presented.