MSA Templates
Basic MSA Templates -Type 1 Gage Study
Click SigmaXL > Templates & Calculators > Basic MSA Templates >
Type 1 Gage Study to access the Type 1 Gage Study Template.
The following example is given in SigmaXL > Help > Template Examples > MSA > Type 1 Gage
Study.
Notes:
- This calculator assumes that the data are normally distributed.
- Enter your data in the Measurement Data column. Minimum recommended sample size is 25, but 50 is preferred. This template has a maximum sample size of 1000, suitable for automated test systems.
- Enter Tolerance (Upper Specification Limit USL - Lower Specification Limit LSL)
- Enter Part Reference Value. If missing, Gage Capability Cgk is not computed. Bias will assume a 0 value.
- Enter Gage Resolution. If missing, Resolution % of Tolerance is not computed.
- The default StDev Multiplier is 6 (99.73% coverage). Change this to 5.15 if AIAG convention is being used (99% coverage). Dietrich [1] recommends using 4 for approximate 95% coverage. We recommend 6 for typical and critical measurement systems, and 4 for non-critical.
- The default Percent of Tolerance for Cg/Cgk is 20. Stacey [2] suggests using 10 for critical measurement systems.
- If Cg and Cgk are >= 1.33, the measurement device is capable. If Cg or Cgk are < 1.33, the measurement device is not capable and needs to be improved.
- If Resolution % of Tolerance (RE%) is <= 5%, the resolution is acceptable. If RE% is > 5% the resolution is not acceptable.
- Click the Type 1 Gage Run Chart button to create a Run Chart with center line = Ref, upper limit = Ref + 0.1*Tol and lower limit = Ref - 0.1*Tol (assuming 20% of Tolerance).
- This calculator requires Excel 2013 or higher.
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