This makes it easier for a user to localize errors which, on the other hand, results in {HEAD ~ a reduction} in {TAIL ~ stoppage times} 
in
This makes it easier for a user to localize errors which , on the other hand , results in { HEAD ~ a reduction } in { TAIL ~ stoppage times }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL