Talk:Dark Elixir Drill/@comment-25075918-20140802165653/@comment-25264874-20140804162031

It's pretty simple. You want to upgrade your Drill, because it will produce more Dark Elixer when it's done than it did before. However, it's going to be down for days for the upgrade, and while it's upgrading, it's not producing! The Catch-Up Point tells you how long it will take for the upgraded production to make up for the production foregone during the upgrade itself.

Note that the Catch-Up Point math works out favorably if you upgrade again very soon after the upgrade completes - starting the Level 3 upgrade immediately after you finish upgrading it to Level 2, for example - because you're still trying to catch up to the production you would've had, only you're applying only Level 3 production figures to both production deficits, instead of applying Level 2 production figures to the first one.