E – 58() Standard Practice for Probability Sampling Of Materials, Sampling-probability sampling, Sampling-textiles, probability sampling of materials. Detail Summary. View all details. Active, Most Current. BUNDLE AND SAVE: View contents of this set. EN. Additional Comments: ALSO SEE ASTM E (R). This practice is primarily a statement of principles for the guidance of ASTM technical committees and others in the preparation of a.
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Acceptance sampling uses statistical sampling to determine whether to accept or reject a production lot of material.
e1005 It has been a common quality control technique used in industry. It is usually done as products leaves the factory, or in some cases even within the factory.
ASTM E – 58() Standard Practice for Probability Sampling Of Materials
Most often a producer supplies a consumer a number of items and a decision to accept or reject the items is made by determining the number of defective items in a sample from the lot. The lot is accepted if the number asttm defects falls below where the acceptance number or otherwise the lot is rejected. In general, acceptance sampling is employed when one or several of the following hold: A wide variety of acceptance sampling plans are available.
For example, multiple sampling plans use more than two samples to reach a conclusion. A shorter examination period and smaller sample sizes are features of this type of plan. Asfm the samples are taken at random, the sampling procedure is still reliable. Acceptance sampling procedures became common during World War II. 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.
Some use of acceptance sampling still remains. Sampling provides one rational means of verification that a production lot conforms with the requirements of technical specifications. 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.
Plans have known risks: These are primarily statistical risks and do not necessarily imply that defective product is intentionally being made or accepted. Plans can have a known average outgoing quality limit AOQL.
A single sampling plan for attributes is a statistical method by which the lot is accepted or rejected on the basis of one sample. MIL-STD was a United States defense standard that provided procedures and tables for sampling by attributes pass or fail characteristic.
e10 Several levels of inspection are provided and can be indexed to several AQLs. The sample size is specified and the basis for acceptance or rejection number of defects is provided.
When a measured characteristic produces a number, other sampling plans, such as those based on MIL-STD, are often used. S105 with attribute sampling plans, these often use a smaller sample size for the same indexed AQL. A subscription fee is required to use the calculators. The “free” calculations have locked features.
From Wikipedia, the free encyclopedia. Advanced Engineering Mathematics, 9th Edition.
ASTM E105 – 16