That would certainly be possible in relation to the costs.
As for the specifics of the project, that information would have to be provided to us, since we obviously can't determine what the project scope or type should be. That isn't part of my responsibilities; nor would I want it to be.
If the government decided to ask us for a project cost estimate from the outset, we could certainly do that if we had access to solid and relevant information.
When you compare the work that was done in 2021 with the work that was done in 2018 or 2017, say, you see a slight difference because the quality of the data may not have been quite the same. Certainly, it's something we can do, provided we have comprehensive and reliable data to the extent possible.
Would it be a good idea? That is a matter for parliamentarians to decide, not me. Naturally, if parliamentarians asked me to undertake such an exercise, I would give it very serious consideration.