I reject that. If you're referring to Moyes' method it is hardly fit for purpose. First off, he spent a lot of cash on dross when he did spend out: Bilyaletdinov was just awful; Beattie was a transfer record too and just terrible. And then there are the numerous £1m territory signings that sank without trace. He spent well in a certain category of around £5M or just less....and that was at a time when the quality of players from other leagues into the PL wasn't there and you could get away with bringing a Championship player in to hold their own in this league. And Moyes's strategy has been superseded by the amount of cash our managers now have. They are increasingly forced into following suit with the PL norm of signing biggish named players just to stand still. I concede that a few more Gueye type ("Moyes like") signings would be a good thing, but generally Moyes' ways are the ways of another, bygone era. You simply cant operate like that anymore.
In short: Moyes' methodology and analytics would be worthless. Each manager has to do what they are comfortable with. Certainly plan ahead and get a defined style and hire managers who continue that style, but transfer strategies are very personal things to a manager.