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Validating a destructive measurement system using Gauge R&R — a case study


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Fig.1

Crossed experimental model
Crossed experimental model

Fig. 2

Nested experimental model
Nested experimental model

Fig. 3

CNX diagram for design of experiments
CNX diagram for design of experiments

Fig. 4

Pareto chart of the standardised effects
Pareto chart of the standardised effects

Fig. 5

Graphical results from crossed Gauge R&R analysis
Graphical results from crossed Gauge R&R analysis

Gauge Evaluation Results from Crossed Gauge R&R Analysis

SOURCESTDDEV (SD)STUDY VAR (6 × SD)%STUDY VAR (%SV)%TOLERANCE (SV/TOLER)
Total Gage R&R0.287741.72652.888.63
Repeatability0.287741.72652.888.63
Reproducibility0.000000.00000.000.00
Operator0.000000.00000.000.00
Part-To-Part9.9791159.874699.96299.37
Total Variation9.9832659.8995100.00299.50

j.emj-2019-0031.tab.0001.w2aab3b7b2b1b6b1ab1b3c12Aa

TERMEFFECTCOEFSE COEFT-VALUEP-VALUEVIF
Constant15.27500.0736207.550.000
Housing25.550012.77500.0736173.580.0005.00
Energy-1.2500-0.62500.0368-16.980.0001.00
Working Pressure-0.5000-0.25000.0368-6.790.0071.00
Standstill Delay5.25002.62500.036871.330.0001.00
Amplitude1.87500.93750.036825.480.0001.00
Housing*Energy6.70003.35000.036891.040.0001.00
Housing*Working Pressure-4.6000-2.30000.0368-62.500.0001.00
Housing*Standsti ll Delay10.90005.45000.0368148.100.0001.00
Housing*Amplitude5.72502.86250.036877.790.0001.00
Cover*Amplitude-9.7250-4.86250.0368-132.140.0001.00
Energy*Standsti ll Delay-3.6750-1.83750.0368-49.930.0001.00
Housing*Cover*Working Pressure5.30002.65000.036872.010.0001.00
Housing*Cover*Amplitude6.72503.36250.036891.370.0001.00
Housing*Energy*Standsti ll Delay0.32500.16250.03684.420.0221.00
Cover*Energy*Standsti ll Delay-21.2750-10.63750.0823-129.280.0005.00
Housing*Cover*Energy*Standsti ll Delay-1.3750-0.68750.0823-8.360.0041.00

Minitab results from DoE Model Summary

SR-sqR-sq(adj)R-sq(pred)
0.147196100.00%99.98%99.58%