Pit Stop vs Number of Mechanics/Engineers

I've searched to see if I could find an answer to my question but couldn't so thought I'd ask it;

Q: Does the number of mechanics or engineers you have a direct impact on the performance at pit stops?

I know that training them will help reduce errors etc, but wondered if I could save a bit of money by having the minimum amount of engineers and mechanics for certain races. This does ignore the refitting out of the cars with new parts.

Really, I'm wondering if I could get away with having 1 menchanic and 1 engineer for when the time requires - but making sure my race performance isn't compromised.

Well you could, but you wouldn't have enough of them to replace parts on the car before a race etc.

You would spend more money in staffing changes than it would be worth also.