Production flow · The flow map · Element
The rework loops
Where work goes backwards, and how often.
The part
What it is
Rework loops are frequently absent from process diagrams and present in the process, which is why measured lead times exceed drawn ones.
The loop rate is what turns a small defect rate into a large capacity loss, since reworked units consume the constraint twice.
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.