In this episode, David and Andrew talk about Common Cause Variation vs Special Cause Variation, and the problem of confusing the two. Using the example of transgender students, David describes how a system’s capability should be expanded rather than using that special cause situation as a weapon to destroy the entire system.

What is the Taguchi Loss Function and how does it apply to education? In this episode, Andrew and David talk about statistician Genichi Taguchi’s idea that the further you move from a measurable quality target, the more quality is lost, even if the item still “meets specifications.” David shows how you can apply this to education.