Production flow · The flow measure · Element
The efficiency
The ratio of processing time to total elapsed time.
The part
What it is
Computed from the flow map, which is why the map has to include queues to be of any use.
Tracked over time, it shows whether flow improvements are holding or whether WIP has crept back up.
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.