Comment by cwillu

Sounds like The Ensigns of Command:

   > LAFORGE: Captain, we can do it. We can modify the transporters.
   > PICARD: Excellent.
   > LAFORGE: It'll take fifteen years, and a research team of a hundred.
   > PICARD: Mister La Forge, I believe we will postpone.
   > LAFORGE: Yes, sir.