24 February 2014: Morteza Farmani

When evaluating characteristics relevant to quality you have to ensure that qualified measurement systems/measurement processes are applied. In order to achieve this goal, we conduct type-1 study, type-2 study or type-3 study of the measurement systems analysis or determine measurement uncertainty according to VDA Volume 5.

However, the application of these procedures in practice sometimes shows that a measurement system or measurement process is unfortunately not suitable for a specific quality-relevant characteristic.

The question: When is a measurement system / measurement process not considered to be qualified?

Several corporate guidelines typically contain the respective specifications. The following examples apply limits that are common and accepted in practice. Some of them are e.g. defined in the Q-DAS guide V2.1 and
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