In {TAIL ~ the operational parameter group}, {HEAD ~ the prime parameter} is the operation cost and the parameter set is a set of operational efficiency parameters  
In
In { TAIL ~ the operational parameter group } , { HEAD ~ the prime parameter } is the operation cost and the parameter set is a set of operational efficiency parameters
REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH