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