Cutting down on Knowledge Areas

I will write what I do today and I was in charge to define for my current work place. We have a project clasification from tier 1 (top) to tier 5 (bottom). Our focus of attention is Project Integration Management. What we do is not cutting areas is to adapt and "making flexible" the governance process which will impact on deliverable generation and control gates execution. Obviously, as @Kiron mentioned, if you do not have something to adquire Project Procurement will not be included just to take an example. But we prefer to put all them in the table and having a checklist to select what to include or not from knowledge area to process that belongs to them.