Annie Zangi, JMP Senior Research Statistical Developer, SAS
Traditionally, control charts for attribute data (p-charts and u-charts) assume the data is either binomial or Poisson and that the mean is constant over time. Rarely is this assumption true in practice. David Laney developed a technique that solves the problem so that control charts work well whether the mean parameter is stable or not. This talk will both walk through the evolution of the Laney P’ and U’ charts and show examples of how best to apply the charts.
