Effective science per minute higher than expected

[Premu]

I'm wondering about my science output. I produce at least 75 science packs per minute of each type on Nauvis, plus a little bit more for those from the other planets. So for any research I should be able to at most consume 75 per minute on the long run.

I have lots of biolabs, each equipped with tier 3 productivity modules. Most of them are uncommon, some are rare and I have even a few epic in the mix. My average productivity bonus is around 60%.

So I'd expect the following effective science output per minute:

75 * 2 * 1.6 = 240

What I apparently get is a value between 280 and 300... and this is measured on the long run, not a short spike where I could temporarily use more science packs due to a backlog. So where does the extra science come from? Where is my math wrong?

[ichVII]

you can go to your total production stats using "P" and checking the box" global production. There you can see your exact science pack production, consumption and total science output. Your science output should now match 3.2 times the consumption. Plus, you can see if your science is actually being produced at the 75/min you expect. If your confusion exists after that, ask again.

[MisterDoctor]

hmm, productivity will not directly increase your output rate, will it? in terms of speed, productivity slows things down. ok over time you have effectively more science in the long run, but not in the sense that it would push up your /min rate.

but then that would move your estimate in the wrong direction. speed is what would actually increase your /min rate, and biolabs have a default speed of 2 + research speed bonus. with productivity modules that would be brought down considerably, especially with level 3 ones. level 3 ones are -15% speed each, for a total of -60% speed from 4. that is applied to the 2 base. so your base is then 0.8. what your ultimate speed is will be determined by your research speed techs. having all of them (not including any repeatable ones that I'm not at yet) seems to give +250%, so then you would be at 0.8 * 3.5 = 2.8 research rate with 4 level 3 prod mods and all research speed techs.

just because they last twice as long would not increase your /min rate of consumption (I don't think?).

what's going to matter next I suppose is how many biolabs you have, how many are running at the same time, and possibly the speed of the current research you are researching.

EDIT: I suppose the productivity does count as increased output rate because you get "free" output occasionally. so then we're at 75 * 2.8 * 1.6 = 336, which is now a bit higher than your actual.

[mmmPI]

My average productivity bonus is around 60%.

Do you mean all your biolab have 60 % productivity ? or does this imply coefficient for lab speed ?

So I'd expect the following effective science output per minute:

75 * 2 * 1.6 = 240

What I apparently get is a value between 280 and 300... and this is measured on the long run, not a short spike where I could temporarily use more science packs due to a backlog. So where does the extra science come from? Where is my math wrong?

240 is what you should get with 60% productivity and 50% drain (X2), but if you have 2 faster lab with higher than 60% productivity and 2 slower lab with lower than 60% that doesn't yield a 60% productivity "on average" considering the 4 labs. It would represent a higher than 60% productivity because the faster lab process more packs.