That's one of the problems with Accenture and consultancy companies as a whole; they will build it, but they will never own or run it. The team(s) assigned to a project will learn just about enough about the domain to be able to fulfill the contract, but they won't be around ten years later to see how it panned out (if they're around three years later that's already an achievement).

Source: I used to work for a consultancy company. Might do so again, the work is more diverse and the pay and perks are much better than 'regular' companies.