A comparison of the calculated performance factors with {TAIL ~ optimum and typical failure mode performance factors} identifies {HEAD ~ performance problems} in the system under test 
A comparison of the calculated performance factors with { TAIL ~ optimum and typical failure mode performance factors } identifies { HEAD ~ performance problems } in the system under test
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH