Have the leading figures in the lean community walked the “Respect for People” talk? Not in my view.

Much of modern statistics is concerned with creating models which contain parameters that need to be estimated. In many cases these estimates can be severely affected by unusual or extreme values in the data.

My last article demonstrated a common incorrect technique—based in “traditional” statistics—for comparing performances based on percentage rates. This a

Up until a few years ago, I wasn’t a big fan of run charts. Why not just go ahead and construct a process behavior chart and move on? Well, sometimes a run chart is more appropriate for certain data structures.