How does POP allocation to factories work?
When you use the add/remove buttons for assigning POPs to work or stop working in a factory, it always makes sure to add the best POP and remove the worst POP first. “Best/worst” is in terms of efficiency, so if you e.g. have assorted POPs of the same size, a clerk POP will be added before a craftsman POP (under the limitations above), and a state-cultured POP will be added before non-state-cultured POP. This means that if you have several factories in a state, make sure to fill up your most important factories first, before the less important ones.
