I have fixed the problem with some missions not completing.
The problem was that those missions had boosted rewards, and the "Finish" process was failing if the boost was too high.
Regarding the "Repair" process:
The options determine the time of the repairs.
The perfect combination of options changes each day, and is random for each player too.
So... it's mostly a guess for now.
If you pick a good combo, and remember it, you can use it again for the same kind of results later in the same day.
Random effect changes at Midnight Artix Server time [Eastern U.S. time]
< Message edited by Captain Rhubarb -- 9/22/2015 18:34:06 >