A gage is to be used for data collection as part of a new SPC program. The quality engineer would like to assess the gage capability. Thirty units produced in succession are taken from the process and measured twice by the operator. The data are shown below:
Readings: 1, 2, 5.2, 5.1, 6.1, 6.1, 5.8, 5.8, 4.3, 4.3, 7.4, 7.4, 6.0, 5.8, 5.0, 5.0, 7.2, 7.1, 4.5, 4.5, 5.9, 5.9
Readings: 1, 2, 5.0, 5.0, 6.0, 6.0, 5.1, 5.2, 6.7, 6.5, 5.3, 5.2, 7.0, 6.8, 6.7, 6.7, 5.2, 5.3, 3.9, 4.0, 6.0, 6.2
Readings: 1, 2, 6.7, 6.6, 7.2, 7.1, 5.1, 4.9, 7.8, 7.9, 4.1, 4.0, 3.5, 3.5, 6.0, 5.9, 4.5, 4.3, 9.3, 9.1, 6.0, 5.9
Part no.: 1, 2
Part no.: 11, 12, 13, 14, 15, 16, 17, 18, 19, 20
Part no.: 21, 22, 23, 24, 25, 26, 27, 28, 29, 30
4, 5, 6, 7, 8, 9, 10
(A) Does it appear that the operator is having difficulty using the gage?
(B) What is your best estimate of the gage variability?
(C) Estimate the product variability.