The delivery engine as it sits on the Desk. Four containers run as columns — i.SOW the specification, x.Project what is being built, y.Agent who does it, and z.Bank the settled record — each one a real spreadsheet rather than a box in a diagram.
The grey bands are the four acts, and they cut across all four columns: a
Sell prompt asks something of i, of x, of y and of
z. That crossing is the whole design — the process is not owned by any
one container, which is what keeps the engine job-agnostic.