As David Moyes becomes West Ham's sixth manager since David Sullivan and David Gold bought the club in 2010, he inherits a team lying in the Premier League's bottom three with only Crystal Palace suffering a worse goal difference.
Moyes brings plenty of experience to the job, from managing Manchester United to a disastrous Sunderland team, and having lengthy spells at Preston and Everton besides coaching abroad with Real Sociedad.
Slaven Bilic departed the London Stadium like a man who was almost relieved to lose his job given the complexities of the problems facing West Ham. Moyes brings a fresh pair of eyes to the situation, but these are five issues he'll have to try and fix quickly.
David Moyes has been named the new manager of West Ham, replacing Slaven Bilic
West Ham's players need picking up off the canvas after a torrid start to the season
1: SORT OUT THE DEFENCE
When West Ham lose, they often get hammered, if you pardon the pun. They have the worst defensive record in the Premier League with 23 goals conceded in 11 games, shipping four goals to Liverpool and Manchester United, three to Southampton, Newcastle, Tottenham and Brighton.
Moyes will work on defensive organisation – one of his strengths – and surely settle on a fixed formation whereas Slaven Bilic fluctuated between three and four at the back. A regular partner for centre half Winston Reid needs to be selected, and that may be helped with Jose Fonte now out for some time with a foot injury.
There needs to be greater protection in front of the defenders as well. Bilic wanted William Carvalho last summer and it looks a big miss now with Manuel Lanzini looking too lightweight to play in front of the back four, and Mark Noble not mobile enough.
Goalkeeper Joe Hart and right back Pablo Zabaleta were brought in from Manchester City to bring in knowhow and experience but they've frequently looked aghast at what they've seen and unable to help the defence become more cohesive.
2: STREAMLINE THE TRANSFER POLICY
Every West Ham manager has found it a tough gig with so many big voices in and around the club. Sullivan, Gold and vice-chairman Karren Brady all have strong opinions and the profile to make them public. Director of football Tony Henry is a big influence, and the hierarchy are more sensitive to the views of fans than happens at most clubs.
The upshot has been a mish-mash of a transfer policy with some players picked by the manager, some by the board, some by Henry. Instead of getting a well-balanced squad, it has become a dressing-room of different cliques.
David Sullivan is one of the powerbrokers Moyes will have to win over if he wants a player
Bilic, for example, would have allowed the unhappy Diafra Sakho to leave and use the money to part-finance a deal for a holding midfielder, but it didn't happen.
Moyes will have the cachet of a new manager who needs to keep the club up. He has to be strong and make sure the signings he wants are given priority. It will help that he worked with Henry at Everton.
3: WIN THE FANS OVER
West Ham fans have spent this season booing the team and manager, using social media to criticise the owners and board, and