Ferrari got the "wrong decision" to choose Mattia Binotto to replace Maurizio Arrivabene as Formula 1 team leader, said former technical director Gary Anderson.
Binotto took charge of Ferrari's engine development after its poor performance at the start of the F1's V6 turbo-hybrid era in 2014.
He was then promoted to a role as chief technical manager in mid 2016 as part of an overhaul designed by then-president and CEO Sergio Marchionne.
Since then, Ferrari has produced two cars capable of fighting on a regular basis, though mistakes from the team and Sebastian Vettel last season meant that the title bid was unraveled for another season in a row.
Speaking in a special live version of The Autosport Podcast on stage at Autosport International, former Jordan Technical Manager Anderson said: "Binotto is a person who has been very good at being a technical manager. You must let him be technical the manager. "
"It's a full-time jo b, seven days a week. It's not a part-time thing.
" It will definitely dilute their technical efforts.
"I think it's the wrong decision. They should have brought another in."
It is unclear who will replace Binotto as manager of Ferrari's technical department, but there are suggestions that the team can choose to just give more responsibility to the air manager Enrico Cardile and head of the engine department Corrado Iotti.
Mercedes has dominated the F1
It has taken Ferrari five years to consolidate its recovery from the mistake, although its best season statistically in a decade was still not enough to deny Mercedes another title twice in 2018.  Anderson said: "I really can't see why you would take your best technical person … and put him in a leadership, political position that is not his forte.
" Why would you do that? " Binotto has been credited with a calming influence on the departments he is responsible for at Maranello, while the Arrivabene was accus ed of creating a culture that points fingers when things went wrong.
Anderson said "you should not have a blamed culture, but someone is responsible and you need to make sure you recognize why it failed and strengthened it "- and that it will not be if Ferrari's team works better if Binotto's movement means that the car is slower.
He added: "You can n easily throw a few tenths of a second in the car and then you scratch to stand up, be competitive and make all the right decisions. "
Anderson also warns that Ferrari could ultimately cost himself a technical asset with his policy of kicking out underperforming team managers.
He said," What happens at the end of 2019 if Red Bull goes between them and suddenly Ferrari is third or fourth in the championship?
"It could happen. [Then] his head will roll.
" They may lose a very good asset because they put him in a position he should not be in. "