One model of the operation, physical and financial together.
Eridyne maintains a world model: a living representation of the assets, the markets, and the operations as one system rather than three, grounded in how the equipment actually behaves rather than in what happened to correlate last year. Holding physics and economics in the same model is not a matter of tidiness. It is what keeps a joint event visible, because a joint event is precisely the thing that falls between two separate models.