Abstract

Traditional 2-class sampling plans are used to classify a lot of items as acceptable or non-acceptable by considering only the number of non-conformities found in the sample. These plans do not provide any consideration for marginal defective items. By considering the near miss item as marginal, the 3-class sampling plans are used to take a decision to accept or reject a lot based on not only the number of non-conformities; but also on the number of marginal items. Link sampling plans are the plans that provide another chance to the marginal quality lots that are not accepted based on the first sample result. This paper presents a procedure for constructing 3-class attributes Link Sampling Plan indexed through Acceptable Quality Level (AQL) and for the desired proportion of marginal items. A table is also constructed for easy selection of these plans.

Author: R. Radhakrishnan and S. Ravi Sankar

Received on: January, 2009

Accepted on: December, 2009