Measurement Uncertainty in Digital Transformation



It is a popular misconception that measurement is an exact science. In fact, all measurements are merely estimates of the true value being measured and the true value can never be known. An estimate implies that there is some degree of doubt about the accuracy of that measurement. For example, the repeated measurement of a fixed quantity will never yield the same result every time. The degree of doubt about the measurement becomes increasingly important with the requirement for increased accuracy. Another example is that due to the relative cost of the fluids, measurement of the flow of petroleum must be much more accurate than say the measurement of water flow for either industrial or domestic supply. Uncertainty of measurement gives an indication of the quality or reliability of a measurement result.

The purpose of this report by TÜV SÜD National Engineering Laboratory for the Department for Business, Energy & Industrial Strategy (BEIS) is to give you an understanding of the sorts of factors affecting the accuracy of a measurement and of the methods used to assess the way in which the various factors contribute to the overall accuracy.

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