J
In which cases is it more appropriate to use k-factors and expanded uncertainty over the Test Uncertainty Ratio (TUR)?
My understanding of it is that k-factors are to be used when there is sufficient data to be able to calculate the combined uncertainty, and that the TUR is simply approximating from the accuracy of the reference standard being used.
Does ISO 17025 give preference to using one over the other?
Also if the reference standard is the dominant contribution to the combined uncertainty is giving a k-factor = 2 equivalent to stating a TUR of 2:1?
My understanding of it is that k-factors are to be used when there is sufficient data to be able to calculate the combined uncertainty, and that the TUR is simply approximating from the accuracy of the reference standard being used.
Does ISO 17025 give preference to using one over the other?
Also if the reference standard is the dominant contribution to the combined uncertainty is giving a k-factor = 2 equivalent to stating a TUR of 2:1?