The QA procedure that permits inspection of only some representative examples of a product is called

The QA procedure that permits inspection of only some representative examples of a product is called

• A. Statistical sampling
• B. 100% inspection
• C. Sequential sampling
• D. Selective sampling

Answer: (A)

Statistical sampling is the QA practice of inspecting a representative subset of items to infer the quality of the entire product lot. By choosing a random sample according to a predefined sampling plan, you can decide to accept or reject the batch with a known level of confidence, defined by the acceptable quality level (AQL). This approach reduces time and cost compared to checking every item, while still providing a reliable basis for decisions about quality. The other ideas don’t fit as well: inspecting every item is 100% inspection, not sampling; sequential sampling is a specific method within sampling where the sample size progresses based on results and isn’t the general term for inspecting a subset; selective sampling isn’t a standard QA term for this practice.

Statistical sampling is the QA practice of inspecting a representative subset of items to infer the quality of the entire product lot. By choosing a random sample according to a predefined sampling plan, you can decide to accept or reject the batch with a known level of confidence, defined by the acceptable quality level (AQL). This approach reduces time and cost compared to checking every item, while still providing a reliable basis for decisions about quality.

The other ideas don’t fit as well: inspecting every item is 100% inspection, not sampling; sequential sampling is a specific method within sampling where the sample size progresses based on results and isn’t the general term for inspecting a subset; selective sampling isn’t a standard QA term for this practice.