A scheme for randomized inspections

We describe a general randomized inspection scheme that satisfies initially stipulated quantitative requirements on detection probabilities and timeliness for nuclear material safeguards verifications, and at the same time makes more efficient use of inspection resources. The scheme reduces intrusiveness into the operations of the inspected plant and strengthens the effectiveness of the inspection due to the unpredictability and the increased intensity of the inspections. The same formalism is applicable to sequential inspections, inspections by strata and inspections of facilities over a large complex, such as a country. The methodology is applicable to a much wider class of inspections including arms control verification