PROMISE: Our kitties will never sit on top of content. Please turn off your ad blocker for our site.
puuuuuuurrrrrrrrrrrr
Quality Digest
Published: Tuesday, May 8, 2007 - 22:00 In a previous era, shop engineers could relax if component parts varied slightly from specification. Parts just had to “fit together.” However the complexity of many of today’s products, ranging from airplane turbines to nanotechnology microscopes, requires ever more advanced measurement capabilities at the shop floor. The ASME standards were needed because measurements often vary each time they are made (even the temperature of the part can change the measurement result by a significant amount). The series of standards also explains dimensional measurement traceability. Traceable measurements demonstrate the connection between the standard international (SI) unit of length (the meter) and the task-specific measurement under consideration; this also requires an uncertainty statement describing the accuracy of the measurement result. The ASME B89.7 standards series addresses, with clear descriptions, the role of measurement uncertainty when accepting or rejecting products based on a measurement result and a product specification; economically efficient methods to overcome differences between two parties in the evaluation of measurement uncertainty; how to determine the economically appropriate decision to accept or to reject a product due to measurement uncertainty; and ways to demonstrate dimensional measurement traceability to the SI unit so that all parties can be sure of the reliability of their measurements. The latest addition to the series, B89.7.3.2, offers simplified guidelines for understanding and evaluating the major sources of measurement uncertainty. NIST researchers chaired the ASME B 89.7 working groups and contributed to other related development work during the five-years it took to develop the five standards. For more information, visit www.nist.gov/public_affairs/techbeat/tb2007_0412.htm#shop. Quality Digest does not charge readers for its content. We believe that industry news is important for you to do your job, and Quality Digest supports businesses of all types. However, someone has to pay for this content. And that’s where advertising comes in. Most people consider ads a nuisance, but they do serve a useful function besides allowing media companies to stay afloat. They keep you aware of new products and services relevant to your industry. All ads in Quality Digest apply directly to products and services that most of our readers need. You won’t see automobile or health supplement ads. So please consider turning off your ad blocker for our site. Thanks, For 40 years Quality Digest has been the go-to source for all things quality. Our newsletter, Quality Digest, shares expert commentary and relevant industry resources to assist our readers in their quest for continuous improvement. Our website includes every column and article from the newsletter since May 2009 as well as back issues of Quality Digest magazine to August 1995. We are committed to promoting a view wherein quality is not a niche, but an integral part of every phase of manufacturing and services.NIST Work Enhances Shop Floor Productivity
(National Institute of Standards and Technology: Washington, D.C.) -- National Institute of Standards and Technology engineers, together with colleagues from industry and other standards organizations have completed a five-part series of standards designed to evaluate the accuracy—and thus usability—of manufacturing measurements. The standards, the last of which was published last month by the American Society of Mechanical Engineers, describe ways measurement personnel can communicate, evaluate and respond to uncertainties in manufactured part measurements. Adopting these standards on the shop floor should enhance manufacturing productivity at the same time that it minimizes scrapping of acceptable parts, unnecessary rework, and even litigation.
Our PROMISE: Quality Digest only displays static ads that never overlay or cover up content. They never get in your way. They are there for you to read, or not.
Quality Digest Discuss
About The Author
Quality Digest
© 2023 Quality Digest. Copyright on content held by Quality Digest or by individual authors. Contact Quality Digest for reprint information.
“Quality Digest" is a trademark owned by Quality Circle Institute, Inc.