Ross Brawn says there won't be a defining moment for when he hands over responsibilities to Paddy Lowe but that it will rather be a gradual process.
Earlier this year Mercedes signed Lowe as their new executive director (technical) with the eventual goal being that he will replace Brawn as the team principal.
However, Brawn says that will be a gradual process as there is no set date for it to start - or end.
"There will be a point in the future when some of the responsibilities I have will be handled by Paddy," Brawn told ESPNF1. "But it won't be an abrupt stop and an abrupt start.
"Paddy and I have known each other for a very long time and we're working on the things where he can make a real contribution to the team. He's started to pick up some of those things and at some point in the future he will take on more responsibility.
"He joined the team earlier than we anticipated, but it will evolve in a way that is most positive for the team. We won't do anything that risks the potential of the team and I imagine that over the next year to 18 months things will evolve. But there is no firm time scale."
The Englishman, though, did reveal that there will come a time when he stops attending all the grands prix, although even that is not yet decided.
"It might be attractive not to have to do all the races. We will see what the best approach is.
"If we conclude that Paddy is better focusing on things at the factory, we will do what we feel is the strongest solution for the team."