Fig.1
Crossed experimental model
Fig. 2
Nested experimental model
Fig. 3
CNX diagram for design of experiments
Fig. 4
Pareto chart of the standardised effects
| TERM | EFFECT | COEF | SE COEF | T-VALUE | P-VALUE | VIF |
|---|---|---|---|---|---|---|
| Constant | 15.2750 | 0.0736 | 207.55 | 0.000 | ||
| Housing | 25.5500 | 12.7750 | 0.0736 | 173.58 | 0.000 | 5.00 |
| Energy | -1.2500 | -0.6250 | 0.0368 | -16.98 | 0.000 | 1.00 |
| Working Pressure | -0.5000 | -0.2500 | 0.0368 | -6.79 | 0.007 | 1.00 |
| Standstill Delay | 5.2500 | 2.6250 | 0.0368 | 71.33 | 0.000 | 1.00 |
| Amplitude | 1.8750 | 0.9375 | 0.0368 | 25.48 | 0.000 | 1.00 |
| Housing*Energy | 6.7000 | 3.3500 | 0.0368 | 91.04 | 0.000 | 1.00 |
| Housing*Working Pressure | -4.6000 | -2.3000 | 0.0368 | -62.50 | 0.000 | 1.00 |
| Housing*Standsti ll Delay | 10.9000 | 5.4500 | 0.0368 | 148.10 | 0.000 | 1.00 |
| Housing*Amplitude | 5.7250 | 2.8625 | 0.0368 | 77.79 | 0.000 | 1.00 |
| Cover*Amplitude | -9.7250 | -4.8625 | 0.0368 | -132.14 | 0.000 | 1.00 |
| Energy*Standsti ll Delay | -3.6750 | -1.8375 | 0.0368 | -49.93 | 0.000 | 1.00 |
| Housing*Cover*Working Pressure | 5.3000 | 2.6500 | 0.0368 | 72.01 | 0.000 | 1.00 |
| Housing*Cover*Amplitude | 6.7250 | 3.3625 | 0.0368 | 91.37 | 0.000 | 1.00 |
| Housing*Energy*Standsti ll Delay | 0.3250 | 0.1625 | 0.0368 | 4.42 | 0.022 | 1.00 |
| Cover*Energy*Standsti ll Delay | -21.2750 | -10.6375 | 0.0823 | -129.28 | 0.000 | 5.00 |
| Housing*Cover*Energy*Standsti ll Delay | -1.3750 | -0.6875 | 0.0823 | -8.36 | 0.004 | 1.00 |
[i] Regression Equation in Coded Units
Burst Strength = 15.2750 + 12.7750 Housing - 0.6250 Energy - 0.2500 Working Pressure
+ 2.6250 Standstill Delay + 0.9375 Amplitude + 3.3500 Housing*Energy
- 2.3000 Housing*Working Pressure + 5.4500 Housing*Standsti ll Delay
+ 2.8625 Housing*Amplitude - 4.8625 Cover*Amplitude
- 1.8375 Energy*Standsti ll Delay + 2.6500 Housing*Cover*Working Pressure
+ 3.3625 Housing*Cover*Amplitude + 0.1625 Housing*Energy*Standsti ll Delay
- 10.6375 Cover*Energy*Standsti ll Delay
- 0.6875 Housing*Cover*Energy*Standsti ll Delay
Uncoded coefficients are not available with non-hierarchical model.
Tab. 2
Gauge Evaluation Results from Crossed Gauge R&R Analysis
| SOURCE | STDDEV (SD) | STUDY VAR (6 × SD) | %STUDY VAR (%SV) | %TOLERANCE (SV/TOLER) |
|---|---|---|---|---|
| Total Gage R&R | 0.28774 | 1.7265 | 2.88 | 8.63 |
| Repeatability | 0.28774 | 1.7265 | 2.88 | 8.63 |
| Reproducibility | 0.00000 | 0.0000 | 0.00 | 0.00 |
| Operator | 0.00000 | 0.0000 | 0.00 | 0.00 |
| Part-To-Part | 9.97911 | 59.8746 | 99.96 | 299.37 |
| Total Variation | 9.98326 | 59.8995 | 100.00 | 299.50 |
Fig. 5
Graphical results from crossed Gauge R&R analysis