Precision

Closeness of repeated measurements to each other, regardless of their closeness to the true value.

Examples

01A lab balance reads 100.21 g, 100.22 g and 100.21 g for the same reference weight: excellent precision, even though the true value is 100.00 g.
02The supplier's gauge report is challenged because it shows precision on one part but says nothing about accuracy against a master.
03When precision on a bore gauge drops and repeat readings scatter by 0.01 mm, the worn measuring tip is replaced before results are used again.