1 / 19

Statistics in Standards and Standards Development

Statistics in Standards and Standards Development. Neil R. Ullman ASQ Section 304 Sept. 19, 2012. ASTM International. Established over 100 years ago Originally - American Society for Testing Materials Later changed to … Testing And Materials

milly
Download Presentation

Statistics in Standards and Standards Development

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Statistics in Standards and Standards Development Neil R. Ullman ASQ Section 304 Sept. 19, 2012 ASQ 304 presentation

  2. ASTM International • Established over 100 years ago • Originally - American Society for Testing Materials • Later changed to … Testing And Materials • Over 140 committees developing consensus standards • Committee E11 on Quality and Statistics ASQ 304 presentation

  3. Early Statistical Efforts • In 1930’s Walter Shewhart Chaired: • Joint Committee on the Development of Statistics in Engineering and Manufacturing • American Society of Mechanical Engineers • American Society for Testing Materials ASQ 304 presentation

  4. ASTM E-1 subcommittee • Subcommittee IX on Interpretation and Presentation of Data was established under ASTM Committee E-1 Method of Testing • Harold F. Dodge - Chairman • Manual committee prepared • A.S.T.M. Manual on Presentation of Data • Later published as Special Technical Publication STP-15 ASQ 304 presentation

  5. STP-15 • Initial section published in 1933 • Presentation of Data • Two Supplements published in 1935 • A - Presenting +/- Limits of Uncertainty of an Observed Average • B- “Control Chart” Method of Analysis and Presentation of Data • First simple to use description of control charting • Incorporated in ASA War Standards Z1.1, Z1.2, Z1.3 ASQ 304 presentation

  6. E11 Organized • In 1946 Committee E-11 on Quality Control of Materials formed • Same time as ASQC • Harold F. Dodge is first Chairman • Listing of some members in 1951 included • Charles Bicking • W.E. Deming • E.G. Olds • L.E. Simon • S.S. Wilks • W. J. Youden ASQ 304 presentation

  7. Early Standards • As an ASTM Committee they could prepare formal consensus standards which also became American National Standards • First standards (works by Deming, Grubbs, Brad Murphy: • E29 – significant digits for conformance to specs • E105 – Probability Sampling • E122 – Calculating sample size • E141 – Acceptance of evidence based on sampling • E177 – Precision • E178 – Dealing with Outliers ASQ 304 presentation

  8. Committee is Opened Up • Originally consisted of 25 self appointed members plus a few liaisons • In mid 70’s ANSI required opening up committee • I joined in 1976 as did a large number of others • It Became Committee E11 on Quality AND Statistics • Was an amazing group who accepted someone from a Community College with a Masters Degree to become integral to the group – I eventually became Chair of E11 and wrote a number of standards. ASQ 304 presentation

  9. Some Members at the time • Acheson Duncan was Chair • People from NBS included Mary Natrella, John Mandel, Ted Lashoff • Ed Deming was still active • Stu Hunter participated • Dick Freund was involved heavily in terminology trying to coordinate efforts between ASQC, ASTM, TC69 • Blan Godfrey came from BTL and Brad Murphy was still active • Others included Gerry Hahn, Ed Schilling, Tom Bainbridge • Several members were actively involved with TC69 and reported back ASQ 304 presentation

  10. ILS Creates Interest in E11 Work • E691 Conducting an Interlaboratory Study to Determine the Precision of a Test Method • Adopted in 1979 • John Mandel and Ted Lashoff of NBS write it • Introduces repeatability and reproducibility • ASTM Form and Style requires ILS for test methods. • Real catalyst for forcing statistical considerations • E11 began assistance and presentations • Mandel and Lashoff also helped prepare ISO 5725 ASQ 304 presentation

  11. More than the ILS • Other concerns had been recognized regarding developing test methods • Test Method needs to be in a State of Statistical Control • Ruggedness testing was important • Understanding what IS the Test Result became recognized ASQ 304 presentation

  12. E1488 • It became important to provide a road map for test method developers • E1488 Guide for Statistical Procedures to Use in Developing and Applying Test Methods • Describes series of phases as standards evolve • Framework for courses ASQ 304 presentation

  13. 4 Phases • Design – Formulation of scope, purpose, creation of draft method, and establish Test Result • Development – Within lab examination, contributions to variation, ruggedness • Evaluation – ILS to obtain Precision &Bias statement (originally Precision and Accuracy) • Monitoring – within lab uncertainty, proficiency ASQ 304 presentation

  14. Flowchart New Standard Consider revisions Based on a few labs: Preliminary Estimate of Repeatability – intermediate precision or Uncertainty estimates Preliminary Design Property to measure Scope and Significance and use of Test Method Initial Design Draft Test Method Sample Requirements Test Results Detection Limit Flow Chart of operations Development Stability and control Ruggedness Variability analysis Uncertainty experiments Review Results Acceptable Need to Evaluate more? Evaluation Laboratories in Statistical Control ILS E691 Just do ILS Review past Results Existing Standard Incorporate Precision Bias Monitoring Control Charting Proficiency Testng Specification of Materials ASQ 304 presentation

  15. Important Aspects • Uncertainty • We recognize this as Within Lab, Long Term variation • Intermediate precision • E2554 using Control Charting methodology • Proficiency Testing programs ASQ 304 presentation

  16. Other E11 standards • Sampling and general Statistics • Control Charting and related standards • Acceptance Sampling • Ed Schilling began process of adopting Mil Stds • Began with a standard on Dodge Romig Tables • In conjunction with reissue of book • Starting with MIL 105 we have been adopting the complete collection of standards and H volumes thus keeping them available (but in ASTM form and style) ASQ 304 presentation

  17. An Open Committee • E11 invites individuals who would like to participate in creating new standards and revising existing ones • Users – representatives concerned with utilizing the standards to provide input on what is good or bad • Producers – those who are interested in helping create new materials and have some expertise • General Interest – academics etc who like to assist in some way. ASQ 304 presentation

  18. Composition Of E11 • Only have a small number of individuals who help in the real work • Several of those individuals also are active on US Tag to ISO TC69 • Several hundred members - most involved with other technical committees such as roads, petroleum, water, paint … • Membership at $75 provides one volume of ASTM standards annually and ability to be an active member of as many committees and subcommittees you want to be on. • Meet outside Philly but all meetings allow online engagement and most real standards work done between meetings. ASQ 304 presentation

  19. Contact Me • You May Contact Me At: • NEIL1@ULLMAN.NET • Neil R. Ullman4 Sarazen Ct, Florham Park, NJ 07932 • 973-822-3327 • Cell 973-464-1982 • I do Training and consulting • Ullman Associates LLC • www.Ullman.Net • (please note – this site has been dormant for many years and is just now being reconstituted) ASQ 304 presentation

More Related