Exemptions and uncertainty to two terms that are not commonly phrased together in metrology. However, ILAC has made provisions for exemptions to reporting uncertainty in measurement while maintaining requirements for accredited calibrations. This article will explore the three exemptions to reporting uncertainty in calibration reports as per the ILAC P14:01/2013. If you are still reporting […]
One of the most frequently asked questions that I receive is “How do I convert my uncertainty estimates to a formula?” In my last post, I showed you how to calculate CMC Uncertainty using the equations in your scope of accreditation. Now, I am show you have to reduce your uncertainty estimates to an equation. […]
Have you ever looked at your scope of accreditation and wondered, “How do I calculate uncertainty with this equation?” If so, you are in luck! I am going to show you step by step, how to calculate CMC uncertainty using the equations in your scope. Over the last two months, I have received a […]
Quantifying UUT resolution uncertainty can vary significantly depending upon a device’s design, functionality, and operation. The resolution of a digital device may not be evaluated in the same manner as an analog device or artifact. Additionally, the resolution of similar devices may vary depending on how it is used. This makes the evaluation of resolution uncertainty […]
Propagation of Uncertainty Propagation of uncertainty is a method that transmits the uncertainties of independent variables through an equation to estimate the uncertainty of the final calculation. When physical quantities cannot be measured with a single direct measurement, we typically perform indirect measurements of two or more quantities to calculate the desired measurement result. By […]
Propagation of uncertainty is an important aspect of uncertainty analysis. It is a method that transmits the uncertainties of independent variables through an equation to estimate the uncertainty of the final calculation. Commonly practiced in error and uncertainty analysis, the method is useful for estimating uncertainty where physical quantities cannot be measured directly. Indirect […]
Collecting Data Before you can analyze and evaluate the measurement system and process, you must collect some data. However, before diving in head first, there are some things that should be considered. Review the Plan First, review your plan. If you do not, you may find yourself repeating the experiment. It is more time efficient […]
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