RFID System Simulation with ANSYS HFSS and Circuit Designer

Radio frequency identification (RFID) uses electromagnetic field to automatically identify and track tags attached to objects. RFID is widely used in many industries for chain management since it can be broadly applied and having high accuracy as long as the tags are within the range. However, how do we know quickly that the RFID devices is having the optimized performance? Does the performance of RFID antenna change with different surrounding/environment?