Acceptance Sampling
5/2/13
Acceptance sampling - Wikipedia, the free encyclopedia
Acceptance sampling
From Wikipedia, the free encyclopedia
Acceptance sampling uses statistical sampling to determine whether to accept or reject a production lot of material. It has been a common quality control technique used in industry and particularly the military for contracts and procurement. It is usually done as products leave the factory, or in some cases even within the factory. Most often a producer supplies a consumer a number of items and decision to accept or reject the lot is made by determining the number of defective items in a sample from the lot. The lot is accepted if the number of defects falls below where the acceptance number or otherwise the lot is rejected.[1] A wide variety of acceptance sampling plans are available.
Contents
1 History 2 Rationale 3 Acceptance sampling for attributes 4 Variables plans 5 See also 6 References 6.1 Books 6.2 ASQ standards 6.3 ASTM standards 7 External links
History
Acceptance sampling procedures became common during WWII. Sampling plans, such as MIL-STD-105, were developed by Harold F. Dodge and others and became frequently used as standards. More recently, quality assurance broadened the scope beyond final inspection to include all aspects of manufacturing. Broader quality management systems include methodologies such as statistical process control, HACCP, six sigma, and ISO 9000. Some use of acceptance sampling still remains.
Rationale
Sampling provides one rational means of verification that a production lot conforms with the requirements of technical specifications. 100% inspection does not guarantee 100% compliance and is too time consuming and costly. Rather than evaluating all items, a specified sample is taken, inspected or tested, and a decision is made about accepting or rejecting the entire production lot.
en.wikipedia.org/wiki/Acceptance_sampling
1/3
5/2/13
Acceptance sampling - Wikipedia, the free
Acceptance sampling - Wikipedia, the free encyclopedia
Acceptance sampling
From Wikipedia, the free encyclopedia
Acceptance sampling uses statistical sampling to determine whether to accept or reject a production lot of material. It has been a common quality control technique used in industry and particularly the military for contracts and procurement. It is usually done as products leave the factory, or in some cases even within the factory. Most often a producer supplies a consumer a number of items and decision to accept or reject the lot is made by determining the number of defective items in a sample from the lot. The lot is accepted if the number of defects falls below where the acceptance number or otherwise the lot is rejected.[1] A wide variety of acceptance sampling plans are available.
Contents
1 History 2 Rationale 3 Acceptance sampling for attributes 4 Variables plans 5 See also 6 References 6.1 Books 6.2 ASQ standards 6.3 ASTM standards 7 External links
History
Acceptance sampling procedures became common during WWII. Sampling plans, such as MIL-STD-105, were developed by Harold F. Dodge and others and became frequently used as standards. More recently, quality assurance broadened the scope beyond final inspection to include all aspects of manufacturing. Broader quality management systems include methodologies such as statistical process control, HACCP, six sigma, and ISO 9000. Some use of acceptance sampling still remains.
Rationale
Sampling provides one rational means of verification that a production lot conforms with the requirements of technical specifications. 100% inspection does not guarantee 100% compliance and is too time consuming and costly. Rather than evaluating all items, a specified sample is taken, inspected or tested, and a decision is made about accepting or rejecting the entire production lot.
en.wikipedia.org/wiki/Acceptance_sampling
1/3
5/2/13
Acceptance sampling - Wikipedia, the free
References: 1. ^ Kreyszig, Erwin (2006). Advanced Engineering Mathematics, 9th Edition. p. 1248. ISBN 978-0-471-48885-9. 2. ^ Montgomery, D. C. (2009). Statistical Quality Control: A Modern Introduction, Wiley, ISBN 978-0-470-233979 Books Pyzdek, T, "Quality Engineering Handbook", 2003, ISBN 0-8247-4614-7 Godfrey, A. B., "Juran 's Quality Handbook", 1999, ISBN 007034003 Squeglia, N L, Zero Acceptance Number Sampling Plans, Fifth Edition, ASQ Press, ISBN 978-0-87389739-6 ASQ standards