MIXED TWO SIDED COMPLETE CHAIN SAMPLING PLANS FOR MAXIMUM ALLOWABLE VARIANCE

In acceptance sampling plans, mean is commonly used for variable inspection in the production field. In some situations, the variance of the quality characteristics is used as the criterion. That is, a lot may be accepted, if the variance of the quality characteristics is less than or equal to a pre-specified maximum (σo 2) value. In this paper, the operating procedure of Mixed Acceptance Sampling Plans with Maximum Allowable Variance is developed. Two-Sided Complete Chain Sampling plan are used in the second stage of mixed plans The Operating Characteristic function and other associated measures of the plan are given. The algorithm and designing of the mixed sampling plan is indexed through AQL and LQL. Tables are constructed for easy selection of the plan. An example is also provided.