Question

A gauge is to be used for data collection as part of a new SPC program. The quality engineer would like to assess the gauge capability. Ten units of the product are obtained and the operator who will actually take the measurements for the control chart uses the gauge to measure each unit of the product three times. The data are shown below: Part Number Measurements 100 95 101 96 98 101 93 103 95 98 98 97 100 97 100 97 96 98 98 98 97 4 95 100 100 100 100 98 10 (A)Does it appear that the operator is having difficulty using the gauge? (B) What are your best estimates of the total variability and product variability? (C) If the specifications on the part are at 100 +20, find the P/T ration for this gauge and comment on its adequacy X-bar and R Charts - Col 1-Col 3 Number of subgroups-10 Subgroup size 3.0 0 subgroups excluded Distribution: Normal Transformation: none X-bar Chart Period UCL: +3.0 Centerline LCL: -3.0 sigma 2 beyond limits #1-10 100.553 98.2 95.8469 Range Chart Period UCL: +3.0 Centerline LCL: -3.0 sigma 0 beyond limits #1-10 5.92077 2.3 0.0 Estimates Perlod Process mean Process sigma Average range Sigma estimated from average range #1-10 98.2 1.35854 2.3

Answer 1

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