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