How to Read the ANSI Tables for Inspections Based on Random Sampling – pptx Download

Manostaxx - Industrial Management Consulting
Manostaxx – Industrial Management Consulting

Random Sampling
¤ 100% inspection can be time-consuming, or destructive.
¤ How many samples to check?
¤ Follow statistics rather than a fixed percentage
¤ Widely used settings:
¤ Normal severity
¤ Level II

Acceptance Quality Limit (AQL)
¤ How to decide if the batch is accepted or rejected?
¤ The buyer and the supplier should agree on AQLs.
¤ Widely used settings for consumer goods in China:
¤ 0% for critical defects (totally unacceptable: a user might
get harmed, or regulations are not respected).
¤ 2.5% for major defects (these products would usually not be
considered acceptable by the end user).
¤ 4.0% for minor defects (there is some departure from
specifications, but most users would not mind it).


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