ANSI/ASQ Z1.9 is to be used with measurements. Both ANSI/ASQ Z1.4 “Sampling Procedures and Tables for Inspection by Attributes” and ANSI/ASQ Z1.9 “Sampling Procedures and Tables for Inspection by Variables for Percent Nonconforming” are to be used with a continuous supply.ĪNSI/ASQ Z1.4 is to be used with go/no-go data (sometimes called attribute data). It is applicable only when the normality of the measurements is assured. Variation may be measured by sample standard deviation, sample range, or known standard deviation. It provides tightened, normal, and reduced plans to be used on measurements which are normally distributed. Sampling Procedures and Tables for Inspection by Variables for Percent Nonconforming Abstract ANSI/ASQ Z1.9-2008 Sampling Procedures and Tables for Inspection by Variables for Percent Nonconforming is an acceptance sampling system to be used on a continuing stream of lots for Acceptance Quality Limit (AQL) specified. BSR/ASQ Z1.9-2003 (R200x), Sampling Procedures and Tables for Inspection by Variables for Perc ent Noncomforming (reaffirmation and redesignation of ANSI/ASQC Z1.9-2003). The switching is dependent upon previous lot inspection /test results. ANSI/ASQ Z1.4-2008 contains sampling schemes which are sampling plans with switching rules.
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