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This paper considers a multistage production process with alternate inspection plans. At each stage a number of alternate inspection plans with different cost and reliabilities may be available. Since more reliable inspections are more costly it is essential to find out a compromise between the reliability and cost. A mathematical model is developed. Dynamic programming is used to determine at each stage that out of the available inspection plans (including the case of no inspection) which one will result in minimum s-expected total cost per item.