Acceptance sampling and AQL: which statement describes their relationship?

Acceptance sampling and AQL: which statement describes their relationship?

• A. Acceptance sampling uses qualitative inspection to select parts for rework.
• B. Acceptance sampling uses statistical sampling to decide batch acceptance; AQL defines the maximum defect rate allowed for acceptability.
• C. Acceptance sampling guarantees zero defects.
• D. AQL determines supplier penalties.

Answer: (B)

Acceptance sampling relies on statistical sampling to decide whether a batch should be accepted or rejected. The AQL, or Acceptable Quality Level, sets the maximum defect rate that is considered tolerable for a batch to be acceptable. The sampling plan specifies how many items to inspect and how many defects are allowed in the sample for the batch to pass; if defects stay within that threshold, the batch is accepted, otherwise it’s rejected or subjected to further action. This approach acknowledges that zero defects are rarely achievable in practice, and it uses the sample to make a risk-based decision about the whole lot. It’s not about reworking parts from a batch, it doesn’t guarantee zero defects, and it doesn’t directly set penalties—those are separate considerations that come from the broader quality, procurement, or contract terms.

Acceptance sampling relies on statistical sampling to decide whether a batch should be accepted or rejected. The AQL, or Acceptable Quality Level, sets the maximum defect rate that is considered tolerable for a batch to be acceptable. The sampling plan specifies how many items to inspect and how many defects are allowed in the sample for the batch to pass; if defects stay within that threshold, the batch is accepted, otherwise it’s rejected or subjected to further action. This approach acknowledges that zero defects are rarely achievable in practice, and it uses the sample to make a risk-based decision about the whole lot. It’s not about reworking parts from a batch, it doesn’t guarantee zero defects, and it doesn’t directly set penalties—those are separate considerations that come from the broader quality, procurement, or contract terms.