I believe letting academic communities in autogestion (as in capacity of workers' self-management) is the way to go. For really large projects you can also incl

I believe letting academic communities in autogestion (as in capacity of workers' self-management) is the way to go. For really large projects you can also include citizens (selected by sortition) and elected politics in addition to the temporarily mandated members of the community in the committee taking the decision. Of course the citizens and politics would have to be trained a bit so the decision process might be long, but these kind of projects are never in a hurry.