Calculate Time Remaining

Question

What\'s a good algorithm for determining the remaining time for something to complete? I know how many total lines there are, and how many have completed already, how shoul

Answer 1

I already knew the percentage complete & time elapsed, so this helped me:

TimeElapsed * ((100 - %complete) / %complete) = TimeRemaining

I then updated this value every time %complete changed, giving me a constant varying ETA.