![]() This issue can be addressed if DOT&E makes changes to the (17, 240) FAT protocol as discussed in Chapters 6 and 7. ![]() This is counter to the philosophy that it should be more difficult for manufacturers to pass FAT than LAT. Further, DOT&E’s FAT protocols are considerably less stringent (higher probabilities of acceptance for the OC curves) than their corresponding LAT protocols. This is primarily due to the different sample sizes (number of helmets and number of shots) as determined from ANSI standard. The OC curves for the LAT plans for the different lot sizes can vary a lot, indicating that the manufacturer’s and government’s risks can be quite different across lot sizes. This chapter examines the operating characteristic (OC) curves for the Director, Operational Test and Evaluation’s (DOT&E’s) LAT plans and compares them with first article testing (FAT) protocols in the Army’s legacy plans and DOT&E’s plans. The number of helmets in the protocols is determined from an American National Standards Institute (ANSI) standard, and they vary by lot size. ![]() A random sample of helmets is selected from the production lot, and the helmet shells as well as hardware are tested according to the LAT protocol. Lot acceptance testing (LAT) is used to ensure that manufacturers continue to produce helmets that conform to contract specifications. ![]()
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June 2023
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