Production in this game is driven like this:
- City will demand for example 45 goods
- If you connect some factory to it, for example refinery, then it will want to produce up to 45 goods
- But you also have to connect resourcers to this factory for it to produce goods
- So if you connect wells to this refinery, the wells will start to extract oil and it will rise after a while up to 45 units too.
Now that we have this explained let’s answer your questions.
- If you connect 2 cities to one industry then that industry will want to produce goods up to the sum of demands of those two cities so yes, the factory will produce more than if it would be connected to only 1 city.
- If you connect 2 or more forests to one sawmill then all those forests will compete with each other and hurt each other production because, again, how much they all produce is driven by how much the sawmill demands. And the sum of all their production should eventually be equal to the sawmill production. It’s better to have one forest producing a lot.
- It is a situation similiar to the one in point 2. Many factories connected to one city will compete with each other for the city demands and hurt each other production.
To sum it up. At the start of the game it is good to connect many cities to one industry because cities are small and demand very little. When the game progresses there will come a time when it will be desirable to disconnect cities from the factory and connect them to some other factory because the sum of their demands will grow beyond what the factory can produce at its maximum. The limit here is 400 units of goods.
Also a little request from me: next time please be more eager to make use of your searching skills. It is not the first time I explain the exact same thing here or on steam.
