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The Quality Cost Conformance Model [9]
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The quality cost conformance model provides an example of a constrained
optimization approach. In this model the economic conformance level (ECL)
is obtained where prevention and appraisal costs are equal to external and
internal failure costs.
Prevention and appraisal costs increase as the level of conformance of
quality increases.
Failure costs are expected to decrease as the level of conformance of
quality increases. Therefore, the total costs associated with conformance of
quality will be U-shaped as indicated in the figure.
Engr. Ali Javed