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The Perfect Companion to SQC Online
Practical Acceptance Sampling (2nd Edition) is a hands-on introduction to the inspection of products and services for quality assurance using statistically-based sampling plans.
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Download first chapter (PDF)
Download first chapter (PDF)
Methods are illustrated using SQC Online, Microsoft Excel, and online calculators.
From the Glossary
The inspection level determines the relation between the batch size and sample size.
Levels I, II, III, IV, V are general inspection levels:
- Level IV is designated as normal.
- Level V requires a larger amount of inspection than level IV, and is used when more discrimination (or power) is needed.
- Levels I, II, III require less inspection than level II, and is used when reduced sampling costs are required, and lower level of discrimination (or power) can be tolerated.