Capacity planning · The capacity model · Element
The constraint
The resource that actually limits total output.
The part
What it is
There is one, and identifying it is usually straightforward: it is where work queues and where everything else waits.
The constraint moves when it is relieved, which is why it needs re-identifying after any capacity change rather than assumed to be permanent.
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.