Test and Measurement World Terminology Section

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Accuracy,Precision-Difference between Accuracy and Precision

This page compares Accuracy vs Precision and mentions difference between Accuracy and Precision.

Accuracy and Precision

• Definition: The accuracy of instrument is a measure of how close output reading is to the correct value.
• Measurements which are close to each other are said to be precise.


Accuracy vs Precision

Measurements can be any of the following.
• Precise but inaccurate
• Neither precise nor accurate
• Precise and accurate

Example: The three robots were programmed to place components at a particular point on a table. The target point was center of a circle as shown in the figure. The three different cases are depicted for these three robots as shown with their individual results. From this one can understand difference between accuracy and precision.



What is difference between or comparison between

Following links mention difference or comparison between various equipments and terms:
comparison between SPI and I2C
difference between PXI and PCI
Microscope vs Telescope
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difference between modem and router
Air Fuel Ratio Sensor vs O2 Sensor
Radiometer vs Spectrometer vs Spectroradiometer
Clamp meter vs digital multimeter
Colorimeter vs Spectrophotometer
difference between Prism and Grating
difference between Venturi meter and Orifice meter
difference between Lux and Lumens




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