So I am trying to learn how to estimate the cost and scheduling of game development. I know once you have a GDD completed you can than do this by using TDD or tech design Document. The only thing is I dont know anything about programming, art or audio to know how long it would take so it is becoming hard to figure in the cost and time needed. Does anyone know or can point me to a site or book where I can learn it. Also trying to get this done so I can finish my business plan.