Stam reckons Solskjaer should take a leaf from Pep Guardiola's book across town at City and only buy players because they fit into his system — not because they are big names.
The Feyenoord coach said: “I was Ole's room-mate when I was at the club, and we are good friends, so we have spoken a lot about what he needs to do. Even in those days I always saw him as a manager. When we were staying in hotels he always spoke about football, about different systems and everything like that, so it was no surprise when he became a manager after playing.
“He has a tough job. It's about what you can do, and what you think about football — but then getting the players to believe in that and in your philosophy. Eventually, by believing in it and getting results, the team will grow. The important thing is to get a system, and the right players for that system."
He added: “A good example is Pep. He has a system and a philosophy of how he wants to play. Then he looks at the players who will fit into that. He's not looking at ones and buying them just because a good player is available.
“Sir Alex Ferguson was the same during his time as manager. He had his philosophy of how to do it, how he wanted to play and he found the players to do that. You look at the qualities in players, the mentality, the character and quality of them. It really doesn't matter if they are not a name – it is about how they will play in the system. If you do that, and recruit well, then you will get results."