I have been chaffing at the Mine being out of commission while upgrading it. I don’t like losing hours of production to only gain +100 ish more iron per hour. I want more iron, and upgrading would seem to be the way to go to get it over time. However, with build times getting longer and longer, at some point it would be better to hold off upgrading until SH 20 is reached to maximize the production of the mine.
For Example, on a farm, going from lvl 13 to 14, takes 9 hours even to complete. During that 9 hours nothing is produced. You lose (9 X 3,202) 28,818 food during this time. It takes 97.35 hours to recoup the lost food so you break even and are where you would of been had you not upgraded. However after that 97.35 hours you are now producing 302 more per hour than you would have been. But you’ve also lost time.
Time is the real currency in this game. It’s harder to place a value on. During these 3+ days you could have been spending that time doing other things to advance.
Comparatively, taking a lvl 13 Mine to a lvl 14 Mine, takes the same 9 hours and you lose (9 X 2,899) 26,091 iron. It takes a much longer 250.87 hours to recoup the lost iron, before breaking even. After breaking even you then are gaining 104 more iron per hour than you would have if you had not upgraded. It seems a paltry amount to me at this level. 10.5 days before breaking even is REALLY long time.
I am asking for help determining when the optimum time to stop upgrading the Mine would be.
Looking at the chart of costs, time to upgrade, and production per hour, it would seem that Mine level 11 is the last largest increase to production per hour. I would guess that this is the best place to stop to maximize the return on investment and push for SH 20.
Can anyone, who is better at maths, help me out with this?
(Sorry for editing after your post Aunty… I had more time later in the day to further explain)