So. Let's figure out how the industrial zone works, and whether it's worth your cost.
For the lazy: Yes. After the update in patch 0.17.0-build.198 the industry zones are much better.



For an industrial zone to work and give you bonuses, all buildings in the zone must be part of the same production. For example, plastic (red) > shoes, consumes plastic (green) > fashion, consumes shoes (blue) > video, consumes fashion (orange) > operating system, consumes video (yellow) > Internet, consumes operating system (black).

The industrial zone must have a level above or equal to parts of the chain. Likewise, a building must not be part of another industrial zone. Buildings may be in any order, but the main thing is that they must be part of the same production. A minimum of 2 buildings is required to start a zone.









For a square map, the work is the same. But the maximum number of buildings in the industry zone will only be 4, because only 4 sides to which you can attach buildings.

Bonuses:
1) You get permits using the N-2 formula, where N is the number of tiers in the chain.
2) You can buy "Industrial Zone Capacity Booster" (Swiss Upgrade and Swiss boosts) from the Swiss Shop in the Swiss boost section. Buying 100% will give you 1 multiplier from the industrial zone for each different building in your industrial zone (6 buildings will give a multiplier of 6).

Policy:
1) "Industry Zone Plus". Every tier or every 10 level of an Industry Zone provide 10% output boost to buildings in it - require all buildings in the zone to be working (Only DLC2)

Also note these policies: Adjacent bonus plus + Tile Modifier Plus + Nature's Power (only DLC1)

Here is an example of effective use of IZ:


















Conclusion: I recommend using the industry zone. Because now, buildings that are part of the industry zone can get an adjacency bonus, thus giving a big bonus.

Consider such a thing as the Resource Booster. This construction will allow us to boost our mines, and with an additional policy, also various buildings.


Level 1 booster, without any bonus consumes 62.5W of energy and 10 science (I have 40, since there are 4 resource boosters on the map), and gives 10% bonus to our oil well.
For each booster built, each booster's science consumption will increase, keep that in mind when you build a lot of boosters.
The maximum bonus you can get on a square map if all 4 resource boosters are working is 40%.
On a hexagonal map, you can put six boosters around the mine, which would give you a 60% bonus, but taking the adjacent bonus into account, that would give you a total of 72%. (The value could be higher or lower, depending on the tile bonus and your multipliers).

In the screenshots below, you can see how the oil well works without the booster, and with it:










We understand how it works. Let's get to the bottom of the policy.

As I said at the beginning, you can boost your factories with boosters, but with some conditions. If we turn on the Supply Chain Booster policy, our boosters will consume twice as much science and energy, but will allow us to boost factories that only consume resources from mines.

As you can see. Our refinery got a 10% bonus from the booster.


But a Resource Booster can only give a bonus to one factory because it boost one mine. If our Resource Booster boost two mines at once, we could boost two factories, etc.
If we have two factory built and the Resource Booster can only give one bonus, it will give priority to the building with the highest level. If the levels are the same, it will choose that at random.



In order to get the maximum out the booster, we need four basic policies:
1) Supply Chain Booster.
2) Adjacent Bonus Plus.
3) Tile Modifier Plus. This will allow us to increase the efficiency by increasing the output. But it will halve the tile bonus.
4) Nature's Power (this policy is for DLC only). It will allow us to compensate for the decrease in the tile bonus from the past policy.

The best effect of these actions will be on the hexagonal map.
Look for mines on it that go in a line. Two or more will do. The main thing is that they're connected to each other and forms a line.















I will consider the option for 3 mines in a line.
We set up our mines. And we put four boosters at the top and bottom of the mines. Next to the boosters, we put the 5 factories we need. In my case, it was glass. Then next to those 5 factories, we build 4 more glass factories.
We should end up with a design like this:
The buildings in red should be upgraded to the highest level so that they have priority for the booster bonus. The rest of the buildings can be left at first level, or you can upgrade them, as long as their level is lower than the ones that should receive the booster bonus. We only need these buildings for the adjacent bonus.
You can also booster power plants if they consume raw resources.
My advice. Always prioritize energy and stockpile mode for boosters and power plants. This will help you avoid problems with outages.

29 permits are required for this design.
Boosted Buildings: 6

Now, knowing how to make your city efficient, you will reduce the number of your buildings and greatly increase production.

The nicest bonus is that they work together. You get a huge increase in efficiency.
I will not describe much, because from the previous paragraphs the logic of their work was clear.



In this screenshot I have compared some setup, using power plants as an example. (Instead of power plants, there can be any building that consumes ONLY raw resources)
The more IZ bonuses you have purchased, the closer your score will be to mine,

Tip: The Resource Booster will break your IZ. if they are up close. Therefore, make your resource booster 1 level higher than your IZ.

Useful trick:
Prices for building upgrades are always different. It depends on the local price of the input items.
If you buy an upgrade for a swiss "Sell/Downgrade Refund" of up to 90%, you can get back the money you spent on all buildings. But no more than you spent on all buildings. You can check this in the central bank "Building Valuation"
For example. An upgrade costs 2m. If you buy now, you can get back 1.8m (90%). But if prices went up to 4m per level after the market reset, you can get back 3.6m.

it is recommended to simply lower the level
And also record how much it cost to upgrade the building
Good building - Skynet, DogeCoin, Faceapp, Operating system and many others

This guide was prepared by one of the creators of Flower's Brotherhood.
Everyone who wears the flag of Macedonia is a member of the brotherhood
My discord: wingedleo