SAE ARP9013/1

Abstract

Purpose: <br>The purpose of this SAE Aerospace Recommended Practice (ARP) is to ensure conformance for each product characteristic being verified in a lot, without maintaining information from previous lots. ARP9013/1 specifies a product acceptance system for isolated lots. For example, isolated lot sampling avoids keeping track of the normal, tightened, and reduced levels of sampling formerly used in MIL-STD-105 and currently used in ANSI/ASQC Z1.4. Because those switching rules provided significant long-term protection for product quality, these isolated lot tables replace that protection in other ways. <br>Field of Application: <br>Inspection may sometimes be performed on an isolated lot, a few lots, or on stored lots at a time when production has been completed. Switching rules are not available to influence the quality. Isolated lot tables by themselves provide no method to reduce inspection costs for processes that prove to deliver consistently defect-free product. The incentive for using isolated lot sampling rather than sampling with switching rules is strictly to avoid the logistical costs of keeping track of what sampling level is applicable.