Search results
7 maj 2021 · Random vs. Systematic Error | Definition & Examples. Published on May 7, 2021 by Pritha Bhandari. Revised on June 22, 2023. In scientific research, measurement error is the difference between an observed value and the true value of something. It’s also called observation error or experimental error. There are two main types of measurement error:
The second edition stressed that the procedures introduced by a laboratory to estimate its measurement uncertainty should be integrated with existing quality assurance measures, since these measures frequently provide much of the information required to evaluate the measurement uncertainty.
5 kwi 2001 · Examples of sources of uncertainty in our field are the measurement of volumes, weighing, reaction temperature, purity of reagents, and value assigned to the calibrator. Also properties of the instrument used e.g. the size and tolerance of the cuvette, if the instrument uses more than one cuvette they may be different, the wavelength etc.
This suite of examples illustrates good practice in evaluating measurement uncertainty in a variety of fields including calibration, testing, comparison and conformity, and relate to sectors that include environment, energy, quality of life, industry and society.
28 wrz 2017 · This chapter presents and explains the most used methodologies for the evaluation of measurement uncertainty in metrology with practical examples.
28 sty 2023 · With a variety of modelling approaches, this chapter provides an overview of measurement uncertainty analysis. The work has also thoroughly explored the measurement uncertainty quantification methodologies, implications, and future prospects.
In the first sections of this Beginner’s Guide, the concept and importance of measurement uncertainty are introduced. Following this, details are given of how to estimate uncertainties in real measurement situations. The main steps involved in calculating the uncertainty for a measurement are outlined with easy to follow examples.
