I think the more proper definition is 1kspm, so not only 1 rocket per minute, but also all the other sciences to match it.

I ended up completely rebuilding my base once I unlocked trains. Hexes everywhere, each one a cell that peoduced one thing, and then I just built enough to support 500smp IIRC. My first rocket launch was from a 500smp factory with no logistics. It took me 80 hours to do that though. XD