One engine per role is leverage. The whole organization wired together is transformation. Every department exposes the functions it can perform; every other department calls them directly — machine to machine, no human relay. This is the Role Programming Interface.
Some functions have dependencies in other departments. Today those handoffs run through humans acting as translation layers — and every translation costs something: lost time, lost energy, lost coherence. RPI removes the relay.
When Function A needs input from another team, a person reformats, forwards, chases, and re-keys it. Each hop loses fidelity and time. The work stalls between departments, not inside them.
Each department publishes the functions it's capable and willing to perform. When one engine needs another, it calls that exposed function directly. Critical information passes machine-to-machine; the receiving human sees only what they must act on — no noise.
Human handoff loops are removed wherever possible, judgment is isolated to the decisions that truly require it, and the enterprise runs in real time at its functional edge. IT governs one consolidated data store; departments subscribe to approved data from approved tables only.
Remove the relay between every department and the whole organization starts to move at the speed of its systems — and people move at the speed of judgment.