
292 A First Course in Quality Engineering
4.13 The data below are the thicknesses of rubber sheets measured in
millimeters by a thickness gage� Two measurements have been taken
of each specimen by each of the two operators� The specications are
at 0�50 and 1�00 mm�
a. Calculate the reproducibility and repeatability errors (standard
deviations), and separate the gage variability and part variability�
b. Verify the adequacy of the gage in resolution and precision�
Part
Operator 1 Operator 2
Trial 1 Trial 2 Trial 1 Trial 2
1 1�00 1�00 1�04 0�96
2 0�83 0�77 0�80 0�76
3 0�98 0�98 1�00 1�04
4 0�96 0�96 0�94 0�90
5 0�86 0�83 0�72 0�74
6 0�97 0�97 ...