The output numerical value of differential production is added to the current production rate of {TAIL ~ the plants} to obtain {HEAD ~ a new production rate} which is applied during the forecast period 
The output numerical value of differential production is added to the current production rate of { TAIL ~ the plants } to obtain { HEAD ~ a new production rate } which is applied during the forecast period
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH