Metrology Department


Good repeatability of a measurement (observations vary only a little from the previous one) may indicate a precise instrument or measurement technique but not necessarily an accurate one. In fact, an instrument with a high resolution (the smallest discernable subdivision of an instrument) could have poor repeatability indicating that the instrument is not very precise and that the resolution is in fact misleading. Similarly, a precise instrument may have a high resolution but this should never be confused with it being accurate.

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Last update: March 08, 2007