There are some processes that might seem to be measurements, but are not: 

• Comparing two pieces of string to see which is longer is not really a measurement.
• Counting is not normally viewed as a measurement.
• Often, a test is not a measurement: tests normally lead to a ‘yes/no’ answer or a ‘pass/fail’ result. (However, measurements may be part of the process leading up to a test result.)

 

 

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Good practice online modules

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• Introduction to measurement
• Introduction to measurement
• Accuracy and precision
• International System of Units
• Definition of realisation of SI base units
• Calibration and traceability