Selection of Mixed Sampling Plans for Second Quality Lots

Abstract In this paper mixed sampling plans for acceptance sampling of second quality lots are proposed. Mixed sampling plans combine process control and lot control aiming at increasing the reliability and/or the efficiency of acceptance sampling plans. The process control part refers to a measurable process characteristic and is based on the normal approximation with known standard deviation. The lot control part is performed by an attribute sampling plan based on the truncated Poisson distribution. The operating characteristic function and associated measures are derived and tables are constructed and presented for an easy selection of the plans.