Testing 1,2,3: You can use this method for your overall measuring process.
Despite the mountains of paperwork and sophisticated systems, occasionally a glitch makes all of that effort appear to have been a waste. It happens to the best of us with the only winners being therapists and system developers claiming to have the answers that will save us from a repeat in the future. But if you think about it, wasn’t the system within which the glitch occurred supposed to prevent them? If yes, will more of the same improve things? Maybe yes, maybe no.
I’m no system developer but I know there are standard programs available to assist you in tracking down the causes of glitches but they only kick in after the fact. Yes, some of the usual ‘best practices’ will assist on the prevention front but if they aren’t done properly, they will not prevent them from happening. Typical of this is calibration reports on your equipment. Too often, if they do not have a red flag, they are simply filed away when a brief review of the data could point to a potential problem that could be avoided.