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Uncertainty Budgets for SOP 4

The purpose of this webinar is to enable laboratory metrology staff to specify uncertainties for SOP 4 following the Guide to the Expression of Uncertainty in Measurement, using SOP 4, SOP 29, and other applicable resources that will be provided.

Learning Objectives:

At the end of this 2 hour session, using notes and SOP 29 and SOP 4, participants will be able to:

  • EXPLAIN the components of uncertainty that need to be included or JUSTIFY their status as negligible; 
  • DEVELOP an uncertainty budget based on concepts presented in NISTIR 6969, SOP 4; 
  • CALCULATE and REPORT measurement uncertainties for SOP 4 calibrations.

Technology Requirement(s):

You will need the following to participate in the webinar:

  • Computer or laptop
  • Internet browser, a broadband connection is recommended
  • Telephone. Optional: a telephone headset

Materials & Supplies:

Not applicable


Participants are expected to have previous training on SOP 4, double substitution procedures and laboratory experience in its application. (OJT training is required as a minimum; OWM Basic Metrology or Mass Seminar attendance is preferred.)

Minimum Requirement(s):

Completion includes completing pre-work assignment, full attendance and participation in the session activities and discussion, and completing an on-line evaluation after the course.


The current fee for webinars is $199 and confirmed participants will be provided a link to make a payment. Registration fees for State weights and measures regulatory officials and metrologists are funded by NIST OWM.


State laboratory staff who have responsibilities for developing, implementing, and/or improving the uncertainty analyses methods and reporting in their laboratory as well as those who are seeking OWM recognition and/or accreditation or improvements to support recognition/accreditation through adding this measurement to their Scope. This course is available for non-weights and measures participants.


Georgia Harris
Office of Weights and Measures,
(301) 975 - 4014
Email: g.harris [at] (g[dot]harris[at]nist[dot]gov)


NIST / Office of Weights and Measures

Class No.

Time: 2:00p.m - 4:00p.m ET

Created February 27, 2013, Updated July 23, 2020