Collection works, slowly. No closure stage exists at all in the current state: engagements are not closed so much as abandoned, which is why historic margin figures cannot be relied on.
Boundary
Trigger (in)
A bill past its due date.
Output (out)
Cash, or an argument.
Requires
none
Produces
none
Floor: can this run itself
Position
person
Manual because
habit
Basis
Chased by hand from an ageing report read once a week.