A skip-lot sampling program is described consisting of three states:(1)lot-by-lot inspection(2)skip-lot inspection(3)skip-lot interruption.The proposed switching rules are based on controlling three characteristics:(1)the number of lots inspected during the lot-by-lot state until qualification(2)the number of lots inspected during the skip-lot state until detection of a change in quality(3)the probability of resuming skip-lot inspection from the interruption state.The program has been submitted as a proposed ANSI standard to the ASQC Statistical Standards Committee and currently is in the Draft 2 stage of acceptance.