9. Sample Size and Confidence. • Calculating Sample Size (ASTM: E – 09). • Demonstrating Confidence in Complying with an Acceptance Procedure (ASTM: . Find the most up-to-date version of ASTM E at Engineering ASTM E, “Calculating Sample Size to Estimate, with. Specified Precision the Average for a Characteristic of a Lot or Process”.
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Standards E122-09 from ANSI provides a money-saving, multi-user solution for accessing standards. This practice will clearly indicate the sample size required to estimate the average value of some property or the fraction of nonconforming items produced by a production process during the time interval covered by the random sample. They provide concepts, tools and techniques to help an organization in planning, implementation and evaluation of an effective statistical process control SPC system.
ASTM E Archives – Document Center’s Standards Forum
This standard is not included in any packages. It outlines the general principles to be understood when assessing accuracy of measurement methods and results. As the voice of the U. ISOPart 1: This standard is intended for use in determining the sample size required to estimate, with specified precision, a measure of quality of a lot or process. Please first verify your email before subscribing to alerts.
During the last few years, the ISO standards on this topic have seen greater usage as well. If so, an estimate of the average value of that characteristic or of the fraction of the observed values that do not conform to a specification for that characteristic becomes a measure of quality with respect to that characteristic.
This practice is intended for use in determining the sample size required to estimate, with specified precision, such a measure of the quality of a lot or process either as an average value or as a fraction not conforming to a specified value.
Catalog of Tools and Techniques, are two additional useful standards.
If the process is not in a state of statistical control, the result will not have predictive value for immediate future production. You can download and open this file to your own computer but DRM prevents opening this file on another computer, including a networked server. ISOPart 2: If the document is revised or amended, you will be notified by email. The standard also provides guidance on the selection of the appropriate inspection system for use in a particular situation.
The practice applies when quality is expressed as either the lot average for a given property, or as the lot fraction not conforming to prescribed standards.
Add to Alert PDF. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. The 5th edition is the current revision of this item.
Please first log in with a verified email before subscribing to alerts. Introduction to the ISO series of standards for sampling for inspection by attributes, is a good starting point for the ISO set.
Tag: ASTM E122-09
The practice applies when quality is expressed as either the lot average for a given property, or as the lot fraction not conforming to prescribed standards. We often sell the following:. It can also be used to establish practical estimations of the various measures by experiment. Filled with pages of tables for use with a continuous supply, the documents are our current best-selling sampling standards.
We have no amendments or corrections for this standard. If the process is not in a state of statistical control, the result will not have predictive value for immediate future production.
ISOPart 3: The level of a characteristic may often be taken as an indication of the quality of a material. Proceed to Checkout Continue Shopping. Need more than one copy? ISOAccuracy trueness and precision of measurement methods and results — Part 1: You may delete a document from your Alert Profile at any time. General statistical terms and terms used in probability. The practice treats the common situation where the sampling units can be considered to exhibit a single overall source of variability; it does not treat multi-level sources of variability.
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Already Subscribed to this document. We often sell the following: Dimensional quantities in the standard are presented only as illustrations of calculation methods. Standards Subsctiption may be the perfect solution.