Repeatability
The value equal to or below which the absolute difference between two single
tests results tested by the same operator, on the same apparatus at the same
laboratory, may be expected to lie with a probability of 95%.
Reproducibility
The value equal to or below which the absolute difference between two single
tests obtained by different operators, on different apparatuses at different
laboratories, may be expected to lie with a probability of 95%.
Acceptability
When single results are obtained in two laboratories and their difference is
less than or equal to the reproducibility, the two results shall be considered
as acceptable and their average, rather than either one separately, shall be
considered as the estimated value of the tested property. If the two results
differ by more than the reproducibility, both shall be considered suspect.
ISO 4259
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