Technician? It only takes one because a technician knows what he/she is doing and knows which way to turn a wrench, and estimate a torque spec. "How many technology managers or PhD researchers does it take" is a completely different question with, surprisingly, the same answer. Yes, it only takes one PhD to screw in a light bulb ( I know this from experience). I just hold the bulb in the socket and the whole world revolves around me!