A practical handbook on measurement uncertainty : FAQs and fundamentals for metrologists / Swanand Rishi.

Format:

Book

Author/Creator:

Rishi, Swanand, author.

Contributor:

Institute of Physics (Great Britain), publisher.

Series:

IOP (Series). Release 24.

IOP ebooks. 2024 collection.

[IOP release $release]

IOP ebooks. [2024 collection]

Language:

English

Subjects (All):

Measurement uncertainty (Statistics)--Handbooks, manuals, etc.

Local Subjects:

Measurement uncertainty (Statistics)--Handbooks, manuals, etc.

Physical Description:

1 online resource (various pagings) : illustrations (some color).

Place of Publication:

Bristol [England] (Temple Circus, Temple Way, Bristol BS1 6HG, UK) : IOP Publishing, [2024]

System Details:

Mode of access: World Wide Web.

System requirements: Adobe Acrobat Reader, EPUB reader, or Kindle reader.

Biography/History:

Swanand Rishi graduated in electrical engineering with distinction in 1986, (with specialization in power electronics) from College of Engineering, Pune, India, and completed a Diploma in Business Management (DBM) with Gold medal in 1998. After graduation until 1995, Swanand worked in several manufacturing industries with products such as UPS/power conditioners, capacitors and lightning arrestors. In those companies, he served in various sections including Production, Quality, R&D, Testing and Marketing. He was instrumental in bringing down rejection of certain capacitors from over 40% down to 5% by radical changes in manufacturing process through measurement assurance and using QC tools. In a UPS manufacturing firm, he was project manager for supply of a unique UPS to India's ambitious missile system. Since 1995, Swanand has been with the Electronics Test & Development Centre (ETDC), Pune, India; a Test and Calibration laboratory under STQC Directorate, Ministry of Electronics & IT, Government of India. He was In-charge of the calibration lab when ETDC got its first accreditation in 2002 for electrical and thermal calibration and significantly contributed to establishing the quality system as per ISO/IEC 17025. Currently he is working as Head (QA & Training) in ETDC, Pune. Since 1998 he has taught in courses and seminars conducted by ETDC on calibration (electrical and thermal), laboratory management per ISO/IEC 17025, measurement uncertainty and certified calibration professional. He has published a few papers in national and international journals/conferences. He was also a faculty member for contact-session courses on the Statistical Process Control (SPC) for MS (Quality Management) programme for post-graduate students of Birla Institute of Technology & Science, Pilani, India. He was a regular guest-lecturer in engineering colleges on subjects such as measurements, testing and calibration; QMS and was also an external project examiner. He was a member of 'Syllabus Review committee' for engineering courses and is also an ISO 9000 Lead Assessor.

Summary:

In the field of metrology, measurement uncertainty has a special place of its own since 'no measurement result is complete without explicit statement about its uncertainty'. Hence for all accredited laboratories, evaluation of measurement uncertainty is a mandatory requirement. The purpose of the book is to clarify the rationale behind certain assumptions or ideas in measurement uncertainty, present the concepts from practical perspective, help readers arrive at a realistic uncertainty figure and be a ready-reference handbook. The book can serve as a quick reference book on basic concepts in measurement uncertainty. The book is written in a manner so that practicing metrologists can open any chapter and start reading. The topics covered are applicable across all fields of scientific measurements.

Contents:

part A. Understanding the fundamentals of measurement uncertainty. 1. Using correct terminology

1.1. Quantity and quantity value

1.2. The measurand and parameter

1.3. Accuracy and precision

1.4. Standard uncertainty and uncertainty contribution

1.5. Error, uncertainty, and expanded uncertainty

2. Why do we need to evaluate uncertainty?

3. Should we talk about the 'evaluation' or 'calculation' of uncertainty?

4. What uncertainty is not

5. Various error terms and bias

6. The Guide to the expression of uncertainty in measurement (GUM)

the new approach

7. The law of propagation of uncertainty

8. Why is standard deviation used instead of variance?

9. Using pooled standard deviation

10. Some uncommon uncertainties

part B. Dealing with distributions. 11. The normal distribution, the t-distribution, and the standard normal distribution

12. Do Type A and Type B evaluations correspond to random and systematic errors?

13. What about reproducibility in uncertainty evaluation?

14. How is it that we can combine different distributions?

15. Guidelines for the selection of triangular and trapezoidal distributions

16. Aren't higher confidence level and larger uncertainty contradictory?

17. Mind the correlations

17.1. The correlation coefficient

part C. Sample size and analysis. 18. Sampling distributions

18.1. Sampling error

19. The sample size dilemma

20. Sample size

another approach

21. Addressing the uncertainty of a single measurement

21.1. How do we proceed if no such information of previous data or history is available?

part D. Decoding degrees of freedom. 22. Why is degrees of freedom generally (n - 1) in type A evaluation?

23. Why is degrees of freedom generally '[infinity]' in type B evaluation?

24. Effective degrees of freedom

some considerations

part E. Some contiguous concepts. 25. What is the significance of the sensitivity coefficient?

26. Dealing with corrections

27. The test uncertainty ratio: use only as a guiding phenomenon

28. Guarding conformity decisions

28.1. What is a guard band?

part F. Delving a little deeper. 29. Treating dominant non-Gaussian components

30. Sample analysis

how normal is the Normal?

31. Sample analysis

detecting the outliers

32. Analyzing the results

32.1. Analysis of the results

33. The proper reporting of uncertainty

34. Alternative approaches in uncertainty evaluation

35. Some important notes in the GUM

Appendix A. Coefficients for the Shapiro-Wilk test and the W statistic for various p-values

Appendix B. Some useful web sites.

Notes:

"Version: 20240701"--Title page verso.

Includes bibliographical references.

Title from PDF title page (viewed on August 1, 2024).

Other Format:

Print version:

ISBN:

9780750364621

9780750364614

OCLC:

1451076416

Access Restriction:

Restricted for use by site license.