I have a few machines that are used to calibrate each other.
Machine 1 has is accurate to 0.025%
Machine 1 is used to calibrate Machine 2, which has an accuracy of 0.005%
Machine 2 is used to calibrate Machine 3, which has an accuracy of 0.025%
Machine 3 is used to calibrate Machine 4, which has an accuracy of 0.04%
Using the root of the sum of the squares gives an error for Machine 4 of just over 0.052%, but I need it to be below 0.05%. Is there any games I can play (like bootstrapping, maybe) to get this error down?
In other words, I can get all sorts of empirical calibration trials...Can I use that data somehow to bring down that error propagation?