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