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