1. You are conducting QC inspection of packaged pharma product for attributes (appearance) using single sampling plan K at AQL level 1.0%. The batch size is 3,000 units. The plan requires you to sample 125 units and accept the batch if you find 3 or fewer defective units, and reject the batch if you find 4 or more defectives. The OC curve for that sampling plan is shown below.

• After reviewing the records for the last 100 batches produced you discover that QC rejected 25 of those batches. Assuming that quality of all batches is about the same, how many defective units should you expect to find on average in every batch?
• You packaging department makes process improvements that are supposed to cut number of defective packages produced by 50%. If so, how many of the next 100 batches produced will likely be rejected by QC?