I Know that I must use EMS, but I don't know How, I used "EnergyManagementSystem:ConstructionIndexVariable" For EMS and I Create 4 window of 4 steps in 'Construction' but I have an error warning that said:"There are 3 nominally unused constructions in input" that was related to my windows. I am afraid of modeling on wrong way and Energy plus ignore other 3 steps, should I use only "EnergyManagementSystem:ConstructionIndexVariable"? or I need to fill others EMS subdivisions? I'd be appreciate if someone help me.