Norwich have sacked manager Chris Hughton and replaced him with youth coach Neil Adams.
The Canaries were beaten 1-0 by West Brom on Saturday and are five points clear of the relegation zone with five games remaining.
They are still to play Fulham, Liverpool, Manchester United, Chelsea and Arsenal.
A Norwich statement said: "The decision has been taken to give the club the maximum chance of survival."
Former Newcastle and Birmingham boss Hughton, 55, guided the Canaries to 11th in the Premier League last season.
Sections of home fans chanted 'we want Hughton out' during the West Brom defeat, but after the match Hughton insisted he was confident of an improvement in form.
"I understand frustrations and it is normal, but we have to understand it is us as a group and everybody is going to get us the results we need," he said.
Adams, 48, made more than 200 appearances for Norwich in the 1990s but has no first-team managerial experience, though he did lead Norwich to FA Youth Cup success against Chelsea last season.
"People know what this club means to me, and so it goes without saying that we will be doing everything possible to ensure that we maintain our top-flight status for next season," he said.
"These final five games will be a huge test for us, and everyone must step up to the mark. But with the full backing of these magnificent Norwich supporters we will have every chance of achieving our objective."
Hughton's backroom staff of former Nottingham Forest and Hibernian manager Colin Calderwood and Paul Trollope have also left the club.
Norwich chief executive David McNally said: "Neil Adams is a progressive and successful coach who has served this club as a player and a member of our coaching staff in exemplary fashion over two decades.
"With our fantastic fans getting behind Neil and the team in the games ahead we will greatly improve our chances of a successful end to the current campaign."
Celtic manager Neil Lennon is one of the bookmakers' favourites to take over in the long term. However, he told the BBC's Match of the Day 2 that he was not looking to leave the Scottish champions.
"It's always flattering to be linked with jobs," the 42-year-old said.
"I'm in a stable position at Celtic. I'm at a great club and it's a privilege to be their manager."
Norwich's next game is at Fulham on Saturday.