Swiss Army Knife Control Chart

The Individuals chart is known as the Swiss Army Knife of Control Charts. This webinar describes this chart and shows examples of it as well as its competitor, the Xbar/R chart.

The Science and Art of Facilitation

What is facilitation? Why is it needed? How do you keep your meetings on track? This webinar answers these questions and many more!

A New Control Chart

The Laney p’ Control Chart is an exciting innovation in statistical process control (SPC). The classic control charts for attributes data (p-charts, u-charts, etc.) are based on assumptions about the underlying distribution of their data (binomial or Poisson). Inherent in those assumptions is the further assumption that the “parameter” (mean) of the distribution is constant over time. In real applications, this is not always true (some days it rains and some days it does not). This is especially noticeable when the subgroup sizes are very large. Until now, the solution has been to treat the observations as variables in an individual’s chart. Unfortunately, this produces flat control limits even if the subgroup sizes vary. David B. Laney developed an innovative approach to this situation which has come to be known as the Laney p’ chart (p-prime chart.) It is a universal technique that is applicable whether the parameter is stable or not.