To start
with, the three basic requirements of measuring correctly are the following:
|
1.
The quantity to be measured must be defined unambiguously. |
|
Example: Measuring task: distance of two
parallel surfaces
|
2.
The unit must be agreed upon or established by a convention. |
|
Example: inch or millimeter? |
3.
The measuring method must be unambiguous. |
 |
Example: Best fit algorithm (Gauss) or circumscribed circle method? |
