Lavery has been shipped out on loan to League Two side Portsmouth, but Carvalhal insists that the transfer is one intended to aid the striker's development.
Indeed, the Portuguese boss says that he is hoping that the 22-year-old returns a stronger player, so he can give him a more prominent role at Hillsborough in the future.
"He has this opportunity with a coach that wants him a lot and it was decisive to him," Carvalhal said. "To me it is very important because he is happy. He will play, I hope that he will do good. We will follow him because he is our player, like we do with Marnick Vermijl.
"I hope he will come back to Sheffield Wednesday more strong in the future. It is why we want to loan him now."
Wednesday's willingness to let Lavery leave on loan shows how expectations have changed at the club this season.
The Northern Irish attacker was a key part of their team towards the back end of last season, but the Owls' summer recruitment knocked him down the pecking order.
With Lucas Joao, Atdhe Nuhiu and Fernando Forestieri more likely to start than Lavery, the club clearly felt that a temporary switch, where he will play regularly, would be best for his progression.
Lavery could make his debut for Portsmouth this weekend, with the League Two promotion-chasers taking on Newport County.