For a given inspection level and acceptable quality level (AQL), traditional ANSI/ASQ Z1.4 sampling plans specify a sample size “n” and acceptance number “c”. ANSI/ASQ Z1.4 also offers double and multiple sampling plans, which reduce the average total inspection (ATI) by accepting very good lots on the first sample, and similarly rejecting very bad lots.
The limiting case of a multiple sampling plan is a sequential sampling plan in which each successive sample consists of a single unit. These plans are designed to accept the good lots as quickly as possible, and reject the bad ones up front. Their ATIs are accordingly lower than those of ANSI/ASQ Z1.4 single, double, or multiple sampling plans, and they are shown to offer similar protection (per their operating characteristic curves) against poor quality.
In this webinar, our expert speaker William A. Levinson shows you how to design sequential sampling plans in ANSI/ASQ Z1.4. The Webinar discusses how you can reduce inspection costs with sequential sampling in ANSI/ASQ Z1.4 and deliver benefits. The presentation also includes an Excel spreadsheet that helps you create sampling plans of this nature based on any ANSI/ASQ Z1.4 normal or tightened inspection plan.
Who should attend?
William A. Levinson P.E.
William A. Levinson, P.E., 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 ... More info