ASQ/ANSI Quality Control Standards: Z1.4 & Z1.9

Purchase ANSI/ASQ Z1.4

Published soft copy
PDF e-standard

Purchase ANSI/ASQ Z1.9

Published soft copy
PDF e-standard

Save 25% with Purchase of Both Standards

Published soft copy
PDF e-standard

The Z1.4 Standard

Standard iconANSI/ASQ Z1.4-2003 (R2013): Sampling Procedures and Tables for Inspection by Attributes is an acceptance sampling system to be used with switching rules on a continuing stream of lots for Acceptance Quality Limit (AQL) specified. It provides tightened, normal, and reduced plans to be applied for attributes inspection for percent nonconforming or nonconformities per 100 units.

  1. Soft cover print version
  2. E-standard (PDF)
  3. Site license for your company's intranet

The Z1.9 Standard

Standard iconANSI/ASQ Z1.9-2003 (R2013): 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. It provides tightened, normal, and reduced plans to be used on measurements which are normally distributed. Variation may be measured by sample standard deviation, sample range, or known standard deviation. It is applicable only when the normality of the measurements is assured.

  1. Soft cover print version
  2. E-standard (PDF)
  3. Site license for your company's intranet

History of Z1.4 & Z1.9

Read an overview describing the origins and purposes of the statistical standards ANSI/ASQ Z1.4, which establishes sampling plans and procedures for inspection by attributes, and ANSI/ASQ Z1.9, which establishes sampling plans and procedures for inspection by variables.

Questions About Z1.4 and Z1.9? Ask the Experts!

Ask the Experts 4Visit the Ask the Experts blog for help with your questions about the Z1.4 and Z1.9 standards.

View previously answered questions on Z1.4 and Z1.9, or submit your own question.

Training

Featured Certification

Quality Engineer (CQE)

Learn more about certification

Books

Articles

Featured advertisers


People Create Quality