difference between %study variance and %tolerance
% Study Variation. % Study Variation is calculated as 100 times the study variation for that source divided by the total study variation. % Tolerance. % Tolerance is calculated as 100 times the study variation for that source divided by the process tolerance. Minitab calculates this value when you specify a process tolerance or specification limit. % Process. % Process is calculated as 100 times the study variation for that source divided by the process variation.