Site Loader

Areas near the specification limits where conformance or non conformance cannot clearly be determined because of the measurement Uncertainty ranges (Figure 1). When the measurement result Y (measured quantity value yi as sociated with the expanded measurement uncertainty UMP) includes one of the specification limits, neither conformance or non-conformance can be proved (Figure4).


Note 1: Uncertainty ranges are symmetrical to the specification limits.
Note 2: As a result, work pieces can neither be automatically accepted nor rejected. For such “dead end cases”, it is advisable to follow the rule below:

Reduce the uncertainty of measurement and thereby reduce the uncertainty range in order that conformance or non-conformance can clearly be demonstrated.

Mutual agreement between customers and manufacturers:


Post Author: ghaemi mohammad

This site has been established to provide updated and specialized information in the field of quality management systems and to share my experiences in the field of conformity assessment and promotion and promotion of this science.

Leave a Reply

Your email address will not be published. Required fields are marked *