ASQ - Statistics Division

The Fallacy of 100% Inspection – Mini Paper Appearing in Fall 1983 Newsletter

Abstract: This mini paper illustrates the fallacy of quality control based on 100% inspection by comparing an uncontrolled process with 100% inspection with a controlled process with no inspection. With 100% inspection and an uncontrolled process the producer has higher costs and the consumer sees lower quality. To achieve the controlled process, the producer has an initial expense. However, the producer has lower overall costs and the consumer sees higher quality.

Keywords: Statistical process control - 100% Inspection - Quality control

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