Uncertainty of Measurement in Microbiological Testing

About Uncertainty of Measurement in Microbiological Testing

Every measurement is subject to some uncertainty. A Measurement result is only complete if it is accompanied by a statement of Uncertainty in the Measurement. Measurement Uncertainties can come from the measuring instrument, from the item being measured, from the environment, from the operator, and from other sources. Such uncertainties can be estimated using statistical analysis of a set of measurements and using other kinds of information about the measurement process.

Further, as per ISO/IEC 17025:2017, when a statement of conformity to a specification or standard is provided, the laboratory shall document the Decision Rule employed, taking into account the level of risk (such as false accept and false reject and statistical assumptions) associated with the Decision Rule employed, and apply the Decision Rule taking into consideration of Uncertainty of Measurement.

ISO 19036:2019 is a standard that focuses on water quality—particularly the determination of the gross alpha and gross beta activity concentration in non-saline water. This document specifies requirements and gives guidance for the estimation and expression of Measurement Uncertainty (MU) associated with quantitative results in the microbiology of the food chain.

It applies to the quantitative analysis of, products intended for human consumption or the feeding of animals, environmental samples in the area of food production and food handling and samples at the stage of primary production. The quantitative analysis is typically carried out by enumeration of microorganisms using a colony-count technique.

Training Shall Broadly Cover

  • Concept of measurement of uncertainty for microbiological quantitative determinations
  • Components of measurement uncertainty
  • Exercises/Workshops with real-life scenarios and case studies to make the training session interactive and more engaging
  • Methodology of estimation of uncertainty
  • Decision rule and statements of conformity
  • Interpretation of Measurement Uncertainty
  • Dedicated ‘Question and Answer’ sessions to facilitate and provide participants with the opportunity to engage actively, seek clarification, and deepen their understanding through interactive dialogue



There are no formal prerequisites for attending the training on the “Measurement of Uncertainty in Microbiological Testing” training Course. However, it is preferred if the participant has a fair understanding of microbiology testing, laboratory techniques, and statistical concepts.


Who Should Attend?

  • Directors/Laboratory Managers
  • Scientists, Auditors, Assessors and Consultant
  • Microbiologist, and Food Analyst
  • Quality Professionals
  • Personnel responsible for technical or quality management of testing laboratories, etc.


What’s Included?

  • Learning materials
  • Copy of ISO 19036:2019 (For Training Purposes only)
  • Certificate of participation (Certificate shall be issued as a ‘Soft Copy’ from our Training Portal. This certificate can be verified anytime from our website tcb.qcin.org by entering its unique ID number or scanning the QR Code)


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