In your experience, which items must be included as rapidly renewable to achieve 2% by cost.
Is it, for example, typical to say
1) Floor covering and,
2) Ceiling panels

I am struggling to see how the mass weighted cost of the floor covering would make up 2.5% of the total building costs (excluding mechanical & electrical systems).

When thinking big ticket items, I think big cost items, i.e. windows, concrete...Does anyone have a rule of thumb recipe for success?