Factory maintainence, scrap,deactivate?

[Chaim]

Nice way of making money

[tkobo]

The thing you have to remember is that you are not just destroying one factory,you are destroying an entire industrial park.
Multiple factories all in the same location.

Blind one put it very well :

You see, a building really isn't just a building, it represents a conglamorate of buildings all at one spot, like an industrial area, thus if you activate it earlier it simply means that you have not yet reached the maximum amount of factory's at that hex and you are activating the current factory's

[Chaim]

Sometimes when i got money problens or no industrial goods i scrap a single factory and it sustains a small industrial goos whoes for a few day (until scrap ends).