Certified Production & Operations Manager (POM) Practice Exam

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What occurs during a Type I error in acceptance sampling?

  1. A defective lot is accepted.

  2. A good lot is rejected.

  3. A good lot is accepted.

  4. A defective lot is rejected.

The correct answer is: A good lot is rejected.

In acceptance sampling, a Type I error refers specifically to the situation where a good lot is incorrectly rejected based on the sampling results. This is a critical concept because it pertains to the effectiveness of quality control measures. When sampling a lot, the aim is to determine whether the entire lot meets quality standards based on inspection of a sample. A Type I error represents a false negative outcome, which means the sample suggests that the lot does not meet quality specifications, even though in reality, it does. This can lead to unnecessary costs and operational inefficiencies since a quality lot is wasted and possibly rejected, impacting overall supply chain productivity. Understanding this concept helps reinforce the importance of selecting appropriate sampling plans and acceptance criteria, as minimizing Type I errors is critical to ensuring that quality products are not unduly rejected, which can adversely affect business operations and customer satisfaction.