Calculation and Application of Operating Characteristic Values of Acceptance Sampling for Cigarette Material

In order to evaluate an acceptance sampling scheme for cigarette material on a scientific and rational base,a binomial distribution-based method for calculating the characteristic values of sampling was proposed by analyzing the acceptance characteristics of cigarette material.The values of acceptance probability,risk quality,etc,of two sampling schemes,A(13,1) and B(32,5),were calculated and analyzed with Excel.The results showed that the acceptance probability(69.57%) of scheme A was lower than that(94.99%) of scheme B,it indicated that the misjudgment rate of A was too high for a batch of products with better quality(rate of unqualified products was 8.5%).However,the acceptance probability of both A and B was under 7% when the product was of lower quality(rate of unqualified products was 30%),which was less than the setting CRQ of 10%.Therefore,the sampling scheme B was more scientific and rational.