Coordinate systems tell a CNC machine where to position the cutting tool during the program’s execution for any purpose that requires the cutting tool to move.
You cannot begin to take advantage of an available feature if you do not know it exists. Conversely, you will not know how to avoid CNC features that may be detrimental to your process.
The act of qualifying CNC programs is largely related to eliminating variations, which can be a daunting task when you consider how many things can change from one time a job is run to the next.
Keeping operators from having to manually make sizing adjustments will free them up to do other things for as long as each finishing tool will last, regardless of how many sizing adjustments it requires.