Acceptance Sampling for Variables (ANSI/ASQ Z1.9)

William A. Levinson, P.E., is Keynote Speaker at Compliance key Inc. He is the principal of Levinson Productivity Systems, P.C. He is an ASQ Fellow, Certified Quality Engineer, Quality Auditor, Quality Manager, Reliability Engineer, and Six Sigma Black Belt. He is also the author of several books on quality, productivity, and management, of which the most recent is The Expanded and Annotated My Life and Work: Henry Ford's Universal Code for World-Class Success.


ANSI/ASQ Z1.9 (formerly MIL-STD 414) is a generally accepted standard for acceptance sampling by variables (real number) data. The sampling plans work by
(1) calculating the sample's average along with a measurement of dispersion (standard deviation or range) and
(2) comparing these results against tabulated criteria to determine whether the lot should be accepted or rejected. Switching rules similar to those of ANSI/ASQ Z1.4 (formerly MIL-STD 105) determine whether sampling should be normal, tightened (i.e. more stringent), or reduced (less stringent).

Why should you attend this webinar?

This webinar will equip the attendee with everything he/she needs to know in order to use ANSI/ASQ Z1.9 effectively. This includes identification of the correct sampling plan, assessment of the results to determine whether the lot should be accepted, estimation of the nonconforming fraction of product, and application of the switching rules.

Areas Covered in the Session:

Know how to use the lot size, the inspection level, and acceptable quality level (AQL) to define the sampling plan in terms of sample size and acceptance criteria.
Know how to assess the sample statistics (average and standard deviation or range) to determine whether the lot should be accepted, and also to estimate the nonconforming fraction of the product in the lot.
Recognize that, when the process standard deviation is known (i.e. need not be estimated from the data), a smaller sample size is required. This ties in with process capability studies in which the process standard deviation is quantified.
Apply switching rules to determine whether inspection should be at the normal, tightened, or reduced level.
Recognize that the characteristic under inspection must follow the normal (bell curve) distribution for ANSI/ASQ Z1.9 to work properly.
Attendees will receive an Excel spreadsheet that reproduces tables B5 and D5 of the standard.

Who can Benefit:

Webinar Id: LSHCAWL002

Training Options:

Duration: 60 mins

 View Anytime

 Recorded: [Six month unlimited access]

 $237 (Single Attendee)  $599 (Unlimited Attendee)

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