Mesa

 

 

 

 

Measurement Process Evaluation

The SPC experiences of many of the world's largest companies have led them to specify control over measurement processes as the crucial first step to be achieved before proceeding with full SPC implementation.  Measurement Process Evaluation (MPE) provides Engineers and Scientists with a powerful range of graphic-rich tools to enable special cause variation to be identified and eliminated from your measurement processes.  The MPE techniques described in the book "Evaluating The Measurement Process" by Donald J. Wheeler and Richard W. Lyday (ISBN 0-945320-06-X) are much easier to understand and apply than traditional R&R (Reproducibility and Repeatability) studies.  For a summary of the key differences between MPE and traditional R&R, click here.  To download our whitepaper describing MPE, click here.


In "Evaluating The Measurement Process" by Donald J. Wheeler and Richard W. Lyday the following aspects of the measurement process are discussed 

  •  Adequate measuring units

  •  Bias

  •  Inconsistency

  •  Discrimination 

Only when these aspects of your measurement process are in order can it be used for SPC implementation.  Not checking this inevitably results in unnecessary adjustments to your manufacturing process resulting in lower quality and increased costs.