IMPROVEMENT OF MULTI-LEVEL CONTINUOUS SAMPLING PLANS

Multi-level Continuous Sampling plans given in 2 and 3 provide a reduced Sampling frequency at geometric sequence: f,f²,…,f^k, … when product quality is good. The purpose of this paper is to decrease the speed of sampling frequency, and change to sampling at rates f,f/2,…,f/2^k-1, …, resulting in a formula of AOQ of CSP- M^* and CSP-T^* plans, and giving contours of AOQ for three-level plan. Criteria for selecting multi-level plan are also discussed.