A KDS system has 3 preparation stations (Cold, Broiler, Pizza), 1 secondary expeditor (Inner Expo), and 1 expeditor station (Outer Expo).
The preparation stations have the lowest production order, then the Inner Expo, and the Expeditor the highest.
Cold, Broiler, and Pizza have Inner Expo as next station and production order 0.
Inner Expo has Outer Expo as next station and production order 1.
Outer Expo has no next station and production order 2.