{HEAD ~ The execution server} supervises {TAIL ~ prioritization} and scheduling of test requests from all client machines in the communications test network 
supervises
{ HEAD ~ The execution server } supervises { TAIL ~ prioritization } and scheduling of test requests from all client machines in the communications test network
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH