# Introduction to Uncertainty Measurement

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Designed for Every Passionate Mechanical Engineer/student to get updated about all aspects of Engineering Design, Quality, Automation, Manufacturing & Management.

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### Uncertainty Measurement

You may be interested in the uncertainty of measurement simply because you wish to make good quality measurements and to understand the results.

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Uncertainty of measurement is the doubt that exists about the result of any measurement. You might think that well-made rulers, clocks and thermometers should be trustworthy, and give the right answers. But for every measurement – even the most careful – there is always a margin of doubt.

Learn the uncommon skill of Engineering: Uncertainty Measurement.

You may be interested in the uncertainty of measurement simply because you wish to make good quality measurements and to understand the results.

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## What is Uncertainty?

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Author: GaugeHow Team

Uncertainty of measurement is the doubt that exists about the result of any measurement.

## Error Vs Uncertainty

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## Accuracy Vs Precision

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## Traceability and Measurement Standard

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Measurement Standard

## Source of Uncertainty

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## How to reduce Uncertainty?

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## Standard deviation

Author: GaugeHow Team

Example of Standard Deviation: Suppose you have a set of n readings Start by finding the average:Consider the set of readings 16, 19, 18, 16, 17, 19, 20, 15, 17â€¦

## Normal Distribution

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## Coverage factor

Author: GaugeHow Team

Usually, standard uncertainty referred by 68% and Expected uncertainty is 95% if we assume a normal distribution. We can create our desire coverage interval as below. case-1 For coverage intervalâ€¦

## How to calculate uncertainty?

Author: GaugeHow Team

To calculate the uncertainty of a measurement, firstly you must identify the sources of uncertainty in the measurement. Then you must estimate the size of the uncertainty from each source.â€¦

## Standard and Expanded uncertainty

Author: GaugeHow Team

Standard uncertainty All contributing uncertainties should be expressed at the same confidence level, by converting them into standard uncertainties. A standard uncertainty is a margin whose size can be thoughtâ€¦