Why do managers struggle with 'big-six' leap?

Moving from a successful Premier League side to a so-called 'big-six' club is sometimes seen as the natural next step for a manager.

So will Andoni Iraola, who has reached a verbal agreement with Liverpool, be able to make the step up from Bournemouth after finishing, ironically, in sixth place with the Cherries?

The data suggests it is one of the toughest transitions in the game - with short tenures, mixed results and no major silverware won by a manager taking that step within the Premier League.

For managers who earn a move to one of the Premier League's biggest clubs, the opportunity can arrive quickly. So too can the scrutiny.

The most consistent pattern is how short those spells tend to be. Of the managers BBC Sport has analysed, the majority failed to last two full seasons, with several dismissed before completing their first campaign.