Settling measurement disputes should be an easy matter since they are all about numbers, but unfortunately it doesn’t work out that way. One party swears their numbers are more precise than the other party’s numbers so there’s nothing to argue about. While that may appear to be the case, it is not always so and too often the party making that claim can’t back it up with anything other than the fact they used an expensive device that reads to millionths compared to the other party’s less than spectacular measuring device.
One attempt at proving their expensive device is better brings forth claims that it can repeat its readings to a very fine degree but, as every dimensional metrologist will tell you, repeatability is an important characteristic, but it is not a reliable indicator of the device’s precision. The same applies to resolution. The fact that the device can be read to a very small amount is not an indicator of how precise it is.