Moyes has endured a traumatic start to life as Ferguson's successor with United currently 14 points behind Arsenal in the Barclays Premier League and out of both domestic cup competitions.
That has left the spotlight firmly on Moyes but Ferguson has dismissed any suggestion United may not give his fellow Scot a fair crack of the whip - saying they will "absolutely'' give Moyes the time he needs.
"Of course they will (stick to their philosophy), they've always been that way,'' the 72-year-old told BBC Sport.
"There's no need to go down that road (discussing Moyes' future). Everybody knows what Manchester United is, absolutely 100 per cent."
Ferguson does acknowledge, though, that struggling new managers are not always afforded such patience at other clubs, and that's a situation he cannot get his head round.
He said: "I can never understand that.
"They (the club's board) must discuss the qualities of the manager they are going to offer the job to, you must look at his CV, his character, the philosophy he has....surely.
"Now if that is the way they have gone about giving the man the job, why don't they persevere with it?
"So then maybe it goes for a year, then they change, and then they go through the same procedure again. It seems to me so stupid."
United's troubles in the Premier League - they have already lost seven times, compared to just five times in the whole of last season - means the chances of retaining their title are looking increasingly slim.
However, Ferguson has not given up hope that United can still lift the trophy and insists this year's championship race is wide open.
"I'm not writing anyone off," he said.
"Tottenham have started coming forward a bit now, Liverpool are doing very well, Everton are doing very well, (Manchester) City are doing fantastic and Arsenal are top of the league.
"With Jose (Mourinho) you expect (Chelsea) to win games playing ugly, but all these teams are in there. United are in behind chasing.''
He added on Sky Sports: "United can do anything. They have got that great philosophy and history, they will always do well.
"I can watch the team whenever I want and I've really enjoyed it. I'm going as a supporter now and instead of suffering with the team, I'm suffering or enjoying it with the fans. I'm really enjoying watching the team play.''