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Repeatability
 
 
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Repeatability is the variation
Variation

Variation means a change within a population, or between sub-populations.* Biodiversity* Genetic diversity, differences within a speciesPhysics:...
 in measurement
Measurement

Measurement is the process of assigning a number to an attribute according to a rule or set of rules. The term can also be used to refer to the result obtained after performing the process....
s taken by a single person or instrument
Measuring instrument

In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantity of real-world object and phenomenon....
 on the same item and under the same conditions. A measurement may be said to be repeatable when this variation is smaller than some agreed limit. According to the Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, repeatability conditions include:

Repeatability methods were developed by Bland and Altman (1986).






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Repeatability is the variation
Variation

Variation means a change within a population, or between sub-populations.* Biodiversity* Genetic diversity, differences within a speciesPhysics:...
 in measurement
Measurement

Measurement is the process of assigning a number to an attribute according to a rule or set of rules. The term can also be used to refer to the result obtained after performing the process....
s taken by a single person or instrument
Measuring instrument

In the physical sciences, quality assurance, and engineering, measurement is the activity of obtaining and comparing physical quantity of real-world object and phenomenon....
 on the same item and under the same conditions. A measurement may be said to be repeatable when this variation is smaller than some agreed limit. According to the Guidelines for Evaluating and Expressing the Uncertainty of NIST Measurement Results, repeatability conditions include:

  • the same measurement procedure
  • the same observer
  • the same measuring instrument, used under the same conditions
  • the same location
  • repetition over a short period of time.
Repeatability methods were developed by Bland and Altman (1986). The repeatability coefficient is a precision measure which represents the value below which the absolute difference between two repeated test results may be expected to lie with a probability of 95%. The standard deviation
Standard deviation

In statistics, standard deviation is a simple measure of the variability or statistical dispersion of a data set. A low standard deviation indicates that all of the data points are very close to the same value , while high standard deviation indicates that the data are ?spread out? over a large range of values....
 under repeatability conditions is part of precision
Precision

Precision has the following meanings:Concepts* Accuracy and precision, measurement deviation from true value and its scatter* arithmetic precision, the number of digits from which a value is expressed...
 and accuracy.

See also

  • Accuracy
  • Precision
    Precision

    Precision has the following meanings:Concepts* Accuracy and precision, measurement deviation from true value and its scatter* arithmetic precision, the number of digits from which a value is expressed...
  • Reproducibility
    Reproducibility

    Reproducibility is one of the main principles of the scientific method, and refers to the ability of a test or experiment to be accurately reproduced, or replicated, by someone else working independently....


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