ISO 21247:2005 pdf download.Combined accept-zero sampling systems and process control procedures for product acceptance.
4.2.4.2 ProportIonate stratified random sampling
When appropriate, the number of items in the sample shall be selected in proportion to the size of sub-lots or parts of the lot, identified by some rational criterion. When stratified sampling is used, the items from each sub-lot or part shall be selected using simple random sampling.
4.2.4.3 Process of sampling
A sample may be drawn after all Items comprising the lot have been assembled, or sample items may be drawn during assembly of the lot, In which case the size of the lot shall be determined before samples are drawn. When the lot satisfies the acceptance criteria of the sampling plan, such lots are acceptable and may be submitted to the customer.
4.2.4.4 NonconformIng product
When sample items are drawn train a lot or during lot assembly and nonconforming items are found, the supplier shall withhold from acceptance that lot or portion of the lot completed and all additional production occurring prior to the initiation and verification of corrective action. The supplier shall take steps to preclude the submission of known nonconforming product to the customer. The customer reserves the right to withhold acceptance of any nonconforming item found, whether that item was part of the sample or not and whether the lot as a whole was accepted or not.
When appropriate, the number of items in the sample shall be selected in proportion to the size of sub-lots or parts of the lot, identified by some rational criterion. When stratified sampling is used, the items from each sub-lot or part shall be selected using simple random sampling.
4.2.4.3 Process of sampling
A sample may be drawn after all Items comprising the lot have been assembled, or sample items may be drawn during assembly of the lot, In which case the size of the lot shall be determined before samples are drawn. When the lot satisfies the acceptance criteria of the sampling plan, such lots are acceptable and may be submitted to the customer.
4.2.4.4 NonconformIng product
When sample items are drawn train a lot or during lot assembly and nonconforming items are found, the supplier shall withhold from acceptance that lot or portion of the lot completed and all additional production occurring prior to the initiation and verification of corrective action. The supplier shall take steps to preclude the submission of known nonconforming product to the customer. The customer reserves the right to withhold acceptance of any nonconforming item found, whether that item was part of the sample or not and whether the lot as a whole was accepted or not.
