It’s actually a remarkable field of study: metrology or the science of measuring.
And as most sciences, it’s an art and a technology:
- inspiration and intuition
- as well as a tool which can be a super-sophisticated instrument.
A lot of measures were orginally defined by the human body: hands, feet and arms for lengths.
The measuring devices that are available nowadays are the results of ingenious engineering!
BUT: all measurements have inaccuracies built in which imply a probability for being accurate. I think that’s funny in a way.
For what are measurements for, if not assuring quality?
The main purpose of measurements is comparability. Good apples need to be compared with bad apples by having a number associated with a measuring unit.
Quality is then determined either by having a high or a low number of measuring units. The average in between is the really interesting number, I think.