They've picked more good managers than bad, Martinez, Souza (sorted the defence), Rodgers, Laudrup, then a few duffers and they went down and got worse, then Potter and Cooper is looking like a good choice.
The recruitment has also been good and they've signed and loaned more good players than bad.
I think the best manager you can get is the key, use a large percentage of your budget on getting the best or develop system to find the best up and coming manager.
We should be scouting for a replacement now whether it's this season or next we should never stop looking, succession planning not panic appointments.