TECHNOLOGY OVERVIEW

Average Out Going Quality (AOQL) Attributes Single Sampling Plan

The BIS.Net Team BIS.Net Team

This type of sampling plan is normally used on batches or lots prior to shipping to a customer, to ensure that the outgoing quality matches the specified level for customer acceptance. Several samples are taken randomly, and the number of defectives counted. If the number of defectives exceed a certain number for that sample size the batch is rejected, and 100 percent inspection carried out. Defective items are then removed and replaced with good items ensuring.

An AOQL sampling plan is obtained by first specifying the AOQL, which must be negotiated with the customer. The AOQL is the maximum level of defectives that will reach the customer. The AQL must also be specified, which will be based on the current in control process. Many combinations of sample size and acceptance value will result in the specified AQL. The chosen sampling plan will be the one which results in the minimum number of items inspected for lots at the AQL and hence the need to specify the AQL.

A typical sampling plan contains an OC Curve and details as shown here.