The computer implemented method 1, wherein the step of modifying a set of {HEAD ~ features} associated with {TAIL ~ the selected user role} to form a set of customized features comprises: 
The computer implemented method 1 , wherein the step of modifying a set of { HEAD ~ features } associated with { TAIL ~ the selected user role } to form a set of customized features comprises :
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH