A P Rocess Control Chart Based on Uncertainty Measurement

The notion of variation and determining and eliminating it has become a subject that has found a wide application area after total quality approach has become widespread. There is a variety of control charts used in determining variation. Since the 1920’s, when W.Shewhart developed the first control chart, control charts, which have been examined many times in every aspect, are accepted to be one of the seven basic tools of quality. X-R Charts, which are the oldest charts used for variables, are based on the assumption that inner distributions of process samples and distribution of parameter values obtained from the inner distributions of these samples fit the normal distribution. In this study, by setting off from this assumption and the notion of entropy, a new limited process control chart that take the uncertainty in the process into consideration is developed.