The fiery Scot, renowned for his infamous 'hairdryer treatment' of under-performing players, insists he has to keep control of the Old Trafford dressing room.
And the only way of doing that, according to the 68-year-old, is by ruling with an iron fist.
Time to kill: Sir Alex Ferguson in warning to Manchester United squad
Speaking at a lecture in Dublin, the United boss said: 'If I losecontrol of these multi-millionaires in the Manchester United dressingroom then I'm dead. So I never lose control. If anyone steps out of mycontrol, that's them dead.'
'Through my development, I've come across two issues - power and control.
'Control is important, very, very important. My control is the most important thing.'
United darlings Roy Keane, David Beckham and Ruud van Nistelrooyhave all been forced out of Old Trafford after locking horns withFerguson.
You're messing with the wrong guy: Nani looks destined to leave Old Trafford
And Portuguese winger Nani looks destined to be the Scot's latest victim, after blasting Ferguson's regime back in November.
'He is a very complicated guy,' Nani said. 'He's tough. If things areOK, he will be OK, but if there is anything he believes to be wrong,you are screwed. He can go from complimenting you to just plaintrashing in a couple of minutes. Has it happened to me? Hell, yes.He'll say "Nani, how could you miss this or this?'
Fergie fall-out: Ruud van Nistelrooy
The United winger has featured for the first-team just twice since his outburst and looks set to be moved on in the summer.
Meanwhile, Ferguson was also quick to dismiss rumours of boardroomunrest by insisting the buck stops with him, and not the owners.
Ferguson said: 'My control is the most important thing. The most important person in Manchester United is the manager.
'I always thought that when I became a manager - and I experienced this in Aberdeen - I had too much control.
'I was doing everything - ordering the pies, looking after the programmes. It was getting me nowhere.
'What happens is that you do too much and then you don't do the important things.
'Then, the directors start to say 'He's too big for his boots' and stuff like that.'
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