Building Importance factor is selected on analysis settings by the user according to Codes
İnternational Design Codes
ASCE 7-16 : Building Importance Factor Selection According to 1.5.1
TSC 2018 : Building Importance Category Selection (3.1.2)
Notation in ASCE
Ie = Building Importance Factor
Risk Categorization
Buildings and other structures is classified according to the risk to human life associated with their damage or failure by nature of their occupancy according to Codes.