Okay, I looked at my capital city, fiddling around with military/social production, and there is definitely *something* going on with the bonus for focus as opposed to no bonus for straight overflow, but trying to do this with pencil and paper was driving me insane, so I set it to not use full screen, and this post is half taking notes as I go along.
But It *looks* like you get some kind of bonus using focus, but I'm having a heck of a time working out the rhyme/reason of it -it *looks* as if you get a social bonus before the production goes to the military - *if* and only if you are also building a building.
Civ bonuses: Military 45%, Social 65%, Research 88%
Capital: 24 research, 24 Industry
5 Xenofactories: 30 Industry
Asteroid mines: 11 Industry: Total 65
Biosphere Modulator: 10% Industry Bonus
First of all, I was under the impression that bonus production was paid for at half price - maybe I've concatenated multiple conversations from different versions, but that doesn't appear to be the case
With both ship and colony production in use
25% 25% 50% --> 26 29 22, for 46 production; Cut off industry, and only 12 inbeing used to produce that 22 rp, so the research bonus is being generated for free, not half for free. That leaves 34 bc used for industry/social, 17 each. 65/4 is 16.25, so it looks suspiciously like a rounding issue, and we're getting the other bonuses for free as well.
Maybe everyone but me understood that, but it's not the way conversations have implied it, so I wanted to mention it.
From there; the question of just how the money moves around doesn't look clear to me.
Knock off either the social or the shipyard production item; and you get 17 points added to the other side, so it looks like the budgeted production get's bonuses, but not the overflow production.
Then we get to the *really* confusing issue, what happens with focus - and all I know for certain, it that it definitely gets a bonus, but it looks like the bonus is from the originating side, *if* that side is already producing something.
Given 0% military, 50% Social 50% Research
Producing no social and a ship gives nothing to military production; it gets refunded to the treasury.
Focusing to the military side give 20; 3 rp and 17 Social, no bonuses produced. Interestingly enough, the other 17 from social is refunded to the treasury.
Producing a ship *and* a social construction howeverwhile focused however; and you get a production of 29 social, 29 military. Take away the 3 RP, and you get 26 military production, the exact 9 bonus production you had before with 25% 25% 50%.
But wait, there's more, because it doesn't work quite the same way with 1% 49% 50%. If you do that, then you get the bonus production with focus irregardless of whether you have a social item being produced - 29 each with focus if both items are being produced, 29+17=46 if no social item is being produced.
At this point, my conclusion is that I still think having it set this way is worth it since I can get the bonus on specific planet with the focus sytem as if I had that planet at 25% 25% 50%, but the exact way it decides to whether to allocate bonuses is definitely odd, perhaps even buggy - perhaps we can safely blame the bureaucrats toiling in little dark rooms deep in the bowels of the empire for the oddity of the system?