Comment 11 for bug 571796

Hoping not to annoy anyone...
How hard is it, to code a better calculation for the productivity?
I mean, why adapt the display to unprecise guesswork, instead of leaving the percentage display (wich is good IMHO) and doing a decent calculation to get more reliable numbers?
What we would need could be something like (cumulated production output in the last 10 minutes) compared to (highest possible production output, if running nonstop and all ingrediens are present).
Or am I again too naive?