12-04-2013, 04:47 AM
Well I was a Mechanical Engineering major whose stream happens to be Manufacturing, so I can tell you that factory retooling basically means that you change the metal stamping molds so that new shapes could be produced. Retooling costs a lot more than just making more copies of the same molds which is what an increase in the number of assembly line require. I suppose the money to make more copies of the same mold in this game is "adjusted" for game-play purposes to balance difficulty, but wait for an official answer from the dev...