Determine lot size
Lot size may be controlled by lot formation criteria contained in procurement of documents. Otherwise establishment by agreement between the responsible authority & the supplier.
Determine inspection level
If the the item specification does not give the inspection level, use inspection level II.
Determine sample size code letter
Based on lot size & inspection level
Determine sampling plans
Single plan is generally selected. Double or multiple sampling may be used.
Sample size & acceptance no.
Assembling single sampling, normal inspection & given size code letter
The sample consisting of the number of unit of products random from the lot.
The defective are counted. If this count does not exceed the acceptance no, entire lot is accepted. If the count equals or exceeds rejection no, then the entire lots is rejected.
Record inspection results
Compute the estimated process average. If this is required by operating procedures, maintain a record of acceptance/rejection decision in order that rules may be followed