B vs C

This is the ultimate validation tool, which will allow us to check if the main cause is the main one or if the solution put in place is much better than the initial situation. Introduction Method B vs C is actually a comparison technique of 2 situations: b The ”...

Precontrol

Precontrol is a tool whose stakes are identical to the Shewhart control charts. Introduction The Precontrol tool, also called stop lamp control and introduced in 1954, is used to track and identify a drift of the solutions implemented. And therefore indicate whether...

Lot Plot

The Lot Plot is the graphical tool developed by D. Shainin allowing to accept or not a batch of production by sampling. Introduction Lot Plot is a statistical method of controlling ┬┤ acceptance by sampling. Developed by Dorian Shainin in the years 1940, she uses...