MSA: An estimated range of values about the measured value in which the true value is believed to be contained

GUM/VIM: Paramètre, associé au résultat d'un mesurage, qui caractérise la dispersion des valeurs qui pourraient raisonnablement être attribuées au mesurande.

6 sigma: The Upper Control Limit (UCL) is a limit in the Control Chart, set above the centerline, typically at +3 standard deviations, in order to determine if the process is in or out of control.

6 sigma: The Upper Specification Limit (LSL) is the upper limit of a tolerance range specified by a customer requirement. A measured value that is above this limit is considered a defect.