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In order for a measurement to be valid, i.e., to have measurement (metrological) traceability, it must be stated with its associated measurement uncertainty.
This article highlights the use of linearity and bias studies to extract information on the accuracy of measurements, highlighting instruments that may need further investigation.
“Measurement uncertainty is the expression of the statistical dispersion of the values attributed to a measured quantity. All measurements are subject to uncertainty and a measurement result is complete only when it is accompanied by a statement of the associated uncertainty, such as the stand deviation."
Calibration reports are supposed to be clear and concise so the reader can understand the details. In fact, the ISO 17025 standard has a section that deals with this topic in specific terms so it would seem there should be no room for misinterpretation.
Younger readers may be surprised to hear that the word plastic was once synonymous with cheap. Maybe that’s why Dustin Hoffman’s character was famously given the career advice to get into plastics in the movie “The Graduate.”
So, the other night I am browsing my local drug store, killing some time as I wait for the pizza I ordered at my favorite pizza joint in the same strip mall.