Energy production is most simply a function of the capital stock in energy, perhaps modified by external scenario. The user can use one of three external scenario approaches: a direct multiplier on production, specification of the rate of growth in energy production, or modification of the capital-output ratio for an energy type (either regionally or globally). The modification of the capital-output ratio both affects immediate production and longer-term investment patterns.
Reserves also affect/limit energy production. The reserves themselves depend on discoveries, which in turn depend on remaining resources. The user can intervene with a discovery multiplier or with a resource multiplier.
Given country/regional production, reserves, and resources, it is possible to compute world totals of each (WENP, WRESER, and WRESOR).