The iteration process continues until the predicted values match {TAIL ~ the measured values} within {HEAD ~ a desired degree} of tolerance 
The iteration process continues until the predicted values match { TAIL ~ the measured values } within { HEAD ~ a desired degree } of tolerance
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH