1. Home
  2. SPC
  3. Quality Management
  4. Lean Six Sigma
  5. Markets
  6. Company
  7. Order Form

Welcome to Quality America's Online Knowledge Center!

  1. Six Sigma
  2. SPC
  3. Quality Management
  4. Quality Tools
  5. DOE
  6. Regression
  7. Statistics
  8. Index

Gage Bias

Also known as Accuracy, Bias is an estimate of the error in the measurement system. Bias is estimated by taking repeat samples of a part or standard using the measurement system, and comparing the average of these measurements with a measurement taken of the same piece using equipment with higher accuracy.

 

BIAS = Average of Measurements – Reference Value

 

% Bias = (Bias / Process Variation) * 100%

 

PV is the Process Variation, which may be estimated as 6 times the Process Sigma value calculated from a control chart.


Quality Improvement Topics Ask the Expert

Unless otherwise attributed, material contained in the Knowledge Center was written by Paul Keller. All material contained herein is copyright QualityAmerica.com All rights reserved. No material may be used in whole or in part without written consent from Quality America.