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Unlike judgment inspection, SQC provides a feedback for the production process that helps to reduce the likelihood of nonconformities.
However, >60% of the companies implementing total quality management see <10% reduction in nonconformities [6].
These mistakes are leading causes of nonconformities.
Mistakes are also a common cause of nonconformities in clinical laboratories.
We have observed that human inspection methods based on subjective criteria, typical of the type described in these studies, generally fail to detect most of the nonconformities generated by mistakes.
The causes of nonconformities listed in Table 1 differ from the traditional view of variation and demonstrate that mistakes are a strong quality concern in the laboratory.
Also, the inspection methods focus on detecting defect-causing conditions upstream of the process and correcting mistakes before they result in nonconformities.
16], reduced nonconformities from 800 ppm to <5 ppm over a 4-year period.
Just as source inspection strives to prevent nonconformities rather than detect them, the best way to achieve quality is to anticipate and prevent quality problems rather than to wait until the problems show up in production or in the laboratory.
The production process and equipment should also be simplified and mistake-proofed to minimize manufacturing nonconformities.
If you want to reduce nonconformities, measure and track the reduction in nonconformities.
In spite of substantial advancements in quality control, we have historically viewed nonconformities as an inevitable part of every process that cannot be entirely eliminated.