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