calculating {HEAD ~ a utilization} for the selected product based on {TAIL ~ product properties} specified by the user 
calculating { HEAD ~ a utilization } for the selected product based on { TAIL ~ product properties } specified by the user
OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH