whydoibother
Arcane
Oh, right. I just internalized it as having 10 factories in that city, rather than having a level 10 factory in the city (and it being impossible to have more than 1 per city).That's called "building levels" in their language, and no. This is in effect setting a percentage of the output to be produced using one production method and another percentage in another? I think it would make sense to have it, esp. in cases where you have all your production of a good concentrated in the same state, which is to say in one "building".
But when playing a state other than the Great Powers, often you want to concentrate some buildings, and you DON'T want to switch production all at once, because it might crash your economy. Or society, if you suddenly fire 10000 labourers and need to hire 2000 machinists, that may or may not exist at the time.