The parts list hasn't been opened since the tender. Designer Alex's firm makes the drawings it thinks are needed.
Who makes what, and when
The back alley's bill so far: 61 weeks · See the bill
I'm on a list now: every drawing, model and record, who makes it and when it's due. Keep the list alive, or I'll arrive late, or not at all.
The wrong way
Owen, the planner, has the inlet chamber on the build programme. Nobody has told the parts list, and nobody has told Owen.
Alex's firm gets drawing. Lots of drawings, very detailed, mostly of whatever seemed important at the time.
Rex, the new assistant engineer, gets a beautiful drawing of a fence nobody asked for. Every bolt is drawn. The fence has a better drawing than the escalators.
Site asks for the inlet chamber drawing, due next week. It isn't on anyone's list.
Dave (site manager): Who's making the inlet chamber drawing?
Alex: Not us.
The programme slips two weeks while it's drawn in a hurry. The fence is finished on time.
Two hundred drawings planned, one fence nobody asked for, and the one that mattered on nobody's list.
+3 weeks on the back alley's bill: A parts list nobody kept alive: two weeks lost drawing the inlet chamber in a hurry.