If, during the climb, (with the throttles in the climb detent)the pilot selects a slower speed ie. green dot, then the engines will go to idle until the selected speed is reached. If that selected speed is never reached, the engine power will remain at idle until splash down. EPR or N1 has nothing to do with the engine speed in the "climb detent"
I'm sorry
rcallahan, but you have a biased understanding how the system works. My precedent answer still applies.
In the same time I find it odd you keep mentioning that point :
Are you pretending at least one of the engines was involuntary kept to idle by the crew but would have been perfectly able, maybe, to deliver full thrust ???
Where are your data please ?