While few managers expect to get anywhere near Sir Alex Ferguson's 27 years as Manchester United manager, the events of the decade since his retirement show just how perilous Premier League jobs have become.
The Scot called it a day on May 8, 2013, having led United to what is still the most recent of their Premier League titles. "The decision to retire is one that I have thought a great deal about and one that I have not taken lightly," he said at the time.
In the 10 years since, Premier League clubs have made more than 100 permanent managerial appointments and countless more in caretaker or interim capacities. Naturally, Mirror Football has taken the step of compiling a full and comprehensive ranking.