Production at a factory is always increasing (tonelage), and energy (MWh) consumption is directly proportional, which would be a positive correlation. In parallel, there is investment and effort for increasing energy efficiency and decrease its usage:
How can I study how much actual energy is being saved from those efforts alone, if the energy increase because of production will always be more than what can actually be saved?
If production was stable, I could just see an overall decrease trend in energy and correlate that to the energy saving methods, but production is forecasted to keep increasing, and machinery and equipment still hasn´t reached its full capacity, so no way to know a baseline of energy consumption behaviour.
Is there a statistical method which would allow me to know an approximate of a certain decrease in consumption correlated to a specific efficiency improvement vs the normal increase trend of energy and Production?
Also, what would be the correct description of this phenomenon or situation?