Minitab 16.2 statistical software update

The Minitab 16.2 statistical software update incorporates diagnostic tools and Laney P' and U' control charts to minimize false alarms due to too much or too little fluctuation in processes with natural variation. P and U charts are used to monitor defectives and defects, respectively. Unlike traditional P and U charts, Laney P' and U'?charts assume that no process exhibits a constant defective or defect rate. As a result, these charts distinguish between common-cause and special-cause variation, thereby indicating whether a process is truly in or out of control. The P Chart and U Chart Diagnostic tools test the process data for overdispersion or underdispersion, respectively, and recommend whether traditional P and U charts or Laney P' and U' charts are more appropriate