Linguistic values related to current liquid inventory, a rate of change of liquid inventory, projected demand requirements and projected unit power costs are inputted into a expert system controller having one or more rule sets that apply {HEAD ~ such input linguistic values} to produce {TAIL ~ output linguistic values} that are converted back to an output numerical value of a forecasted differential production rate to be applied during a forecast period 
Linguistic values related to current liquid inventory , a rate of change of liquid inventory , projected demand requirements and projected unit power costs are inputted into a expert system controller having one or more rule sets that apply { HEAD ~ such input linguistic values } to produce { TAIL ~ output linguistic values } that are converted back to an output numerical value of a forecasted differential production rate to be applied during a forecast period
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