Industries DLC building bonus values?

[Superbroom]

I am trying to put together a spreadsheet that would help players determine their industry supply/demand and am running into a problem when calculating an industrial zone's efficiency bonus.
If I have a zone that is level 5 with no additional worker barracks, my efficiency bonus is 16%. However, when I add 1 barracks building to the zone, the efficiency bonus is now 22%. I would expect this to be 21% given that the workers barracks increases a zone's efficiency by 5%.
Therefore I would expect something like a Medium Crops Greenhouse to produce 9,680 units rather than the 9,760 units it is actually producing. I do not have any zone policies established either.

Is there some hidden value that is being calculated into this? i.e. the actual "before" bonus is 16.5%, and the bonus with the 1 worker barracks is "5.5%" totaling 22%? Additionally, if that statement is true, is there some sort of list of values that these buildings use, or is there some place in the game files that I can get that data?

 

[Cosa]

I use reddit spreadsheet to determine minimum values for full chain to work. Then I just wait until I have a good supply line ready. Problem is if you advance to next layer in chain if your trucks are out exporting stuff and not delivering to your chain. Altho it should stabilize after few rounds and when trucks come back, its good to be in place when you are ready...

Extractors -> Raw Storage -> Processor -> Warehouse (next to factory ideally, cannot import anyway) -> Factory

If your factory is too far from Processor you might want to add one of those intermediary exchanges at the crossroads of all industry zones. Search youtube for "Mega Warehouse Farm". You can use that one or build your own.

 

[Cosa]

Slow pace:
1) Develop forestry:
- Build Furniture factory as it uses only things from forestry
2) Develop Farming
- Build Bakery (same as above)
3) Develop Mining
- Build Steel factory (same as above)
4) Build Lemonade Factory
An important difference here as they use stuff from Farm + Ore
5) Take a little break from the industry to take care of your city a bit, as the next phase is fast pacing. You will need full focus. All other factories use Plastics and you need to have a stream of supply. I suggest investing heavily in crude oil storage to avoid exports unless you are playing with unlimited resources. I suggest setting tanks to "Fill" until you develop plastic processing and then release one after another all your tanks so that your plastic production is ok.
6) There are 12 more factories to build at this point, I suggest to start from those that need the least amount of stuff, like the printing press and household plastics and to finish with those super expensive that take 4 ingredients.