Learn how to create and interpret a normal probability plot in SPC, and what to do if your data is not normal.

The process producing the rods is in statistical control, and as a preliminary step in a capability analysis of the process, you decide to check whether the diameters are normally distributed. The ...

The cutting process is in statistical control. As a preliminary step in a capability analysis of the process, it is decided to check whether the distances are normally distributed. The following ...

This paper considers the problem of choosing a plotting position to use in constructing a normal probability plot. Previous recommendations have focused primarily on choosing a position so that the ...