EVALUATION OF RESPONSE CHARACTERISTICS OF CHAIN SAMPLING INSPECTION PLANS.
RUTGERS - THE STATE UNIV NEW BRUNSWICK N J STATISTICS CENTER
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This report gives an evaluation of Chain Sampling Inspection Plans pertaining to response characteristics, i.e., their ability to respond to an abrupt change in the process fraction defective, p. Average run length ARL is used as a measure of the response. The process model and a number of ARLs of different type are defined a general derivation of ARL is given and the ARLs and a number of contrasts between these ARLs are obtained and discussed to compare ChSP plans with non-cumulative plans as well as among themselves. The gain in inspection efficiency reduction in average sample size, ASN for two-stage chain sampling plans appears to be promising compared with the extra lag in detecting process changes that results from the use of the cumulative procedure.
- Statistics and Probability
- Manufacturing and Industrial Engineering and Control of Production Systems