I didn't go to Consultants School, but on the occasions I've worn the teeshirt I've regarded the role as firstly finding out from the client what they actually want to achieve (not what boxes someone's told them they need), which means talking to the people who are going to use it, rather than just the suits, sorting out their budget (which may have no slack if the money is a grant or legacy) & then writing a performance spec. Everything supplied needs to be "professional" quality & preferably industry-standard, but I am happy to let potential suppliers come up their own solutions, using brands they are familiar with, as long as they meet the spec or can come up with a convincing argument for varying it. Provided you can tease out of the client what they really want to do (beware music tech), this approach worked for me.