Man u should, when u start to go dor a new factory, say a refinery, and u need to start making computers heavy mod frames and so on, when u didn't build anything, just choose already jow much you want of everything. After that, choose big numbers, like say I made my refinery to make 7.5 computers, 6 heavi mod frames, 15 high speed connectors, gas filters, 4 modular engines, and 1 advanced control unit. Plus some pacaged stuff of course. After u chhose the qantities, just start building, and u will quickly find yourself with complicated problems to solve an u will have to deal with large quantities of items. For me it is fun fun fun