It was announced yesterday that the 55-year-old Scot would take charge of the Baggies on a rolling 12-month contract, leaving his role as Everton's academy manager.
"[West Brom are] run very sensibly and, as a result of that, any head coach coming in has got a great chance of doing a good job," he told the club website.
"A number of the players who have had success in the Premier League with the club are still here.
"But it's a small squad at this moment in time and, clearly, the first job is going to have to be to get some more players in."
Irvine has previous management experience with Preston North End and Sheffield Wednesday.