the physical path was the most important aspect of the nerc tag in terms of understanding the impact of a collection of individual transactions after they had been compiled into a single complete transaction. to complete the physical path it was necessary to identify the power system and power plant where the energy was to be generated, any and all power systems that would be utilized to move the energy to its eventual destination, and lastly the power system and location of the delivery point where the energy would be consumed (the "load").