Master Black Belt

A person who has received training beyond a Black Belt. The technical, go-to expert regarding technical and project issues in Lean Six Sigma. Master Black Belts teach and mentor other Belts, their projects and support Champions.

Mean

See Average.

Measurement

The act of obtaining knowledge about an event or characteristic through measured quantification or assignment to categories.

Measurement Accuracy

For a repeated measurement, it is a comparison of the average of the measurements compare to some known standard.

Measurement Precision

For a repeated measurement, it is the amount of variation that exists in the measured values.

Measurement Systems Analysis (MSA)

An assessment of the accuracy and precision of a method of obtaining measurements. See also Gage R&R.

Median

The middle value of a data set when the values are arranged in either ascending or descending order.

Metric

A measure that is considered to be a key indicator of performance. It should be linked to goals or objectives and carefully monitored.