speeding up 3d printing rocket production

the easiest way to determine success of a rocket company is to measure amount of succesful launches of payload that have made money from paying customers 

if a rocket company 3d prints large parts of a rocket 

and that production is too slow to often reiterate better designs of previously produced and launched rockets 

then the solution is simple, 

instead of 3d printing large parts, 

3d print smaller parts and weld those parts together into larger parts 

using many 3d printing production stations 

instead of a few 3d printing production stations 

3d printing is a promising technology for rocket production, aircraft production and in the future all industrial production 

and 3d printing will probably become be the standard in space based industrial production