All Shewhart charts have the following characteristics: Each point represents a summary statistic computed from a sample of measurements of a quality characteristic. For example, the summary statistic ...

Journal of the Royal Statistical Society. Series C (Applied Statistics), Vol. 40, No. 1 (1991), pp. 1-12 (12 pages) A standard combined Shewhart-cumulative score quality control scheme for controlling ...

The Shewhart chart is named after Walter A. Shewhart (1891-1967), a physicist at the Bell Telephone Laboratories, who introduced the method in 1924 and elaborated upon it in his book Economic Control ...

When asked “what is your surgical site infection rate?” one will get an answer that is almost certainly removed from reality. As a career academic surgeon, it has always been interesting to me how ...

Methods of statistical process control were briefly investigated in the field of educational measurement as early as 1999. However, only the use of a cumulative sum chart was explored. In this article ...

Control charts that are properly constructed and maintained prevent false out-of-control signals and provide a useful method for monitoring a process. Process control is and has been an important ...

Description: Principles and methods of statistical process control: Shewhart control charts; process capability; cumulative sum and exponentially weighted moving average charts; probability properties ...