Quality management · The specification · Element
The tolerances
The acceptable range for each characteristic, and where it came from.
The part
What it is
Tolerances should derive from what the next step or the customer requires, not from what the process currently achieves.
Unnecessarily tight tolerances are one of the most expensive and least visible costs in manufacturing.
The smallest level
The attributes it carries
Each attribute is one of the framework’s shared types. What a date is, and how it is written, is defined once for the whole model — the note here says what it means in this particular place.