First of all, what's the advisory service line? The four largest services offered from the Big 4 are audit, tax, consulting and advisory but what's advisory? Is it just financial advisory?
Second, is consulting part of the advisory service line?
Third, are their transaction advisory service or their corporate finance operations apart of the "advisory" service line or are they their own thing?
Lastly, the Big 4 offer legal, actuarial and risk management services so what service line would they be part of?