Hi all,

I make models of natural resource projects. The models are based on a dashboard page where you can change the inputs and they will feed through to the calculations page of the model. I want to make the start year of production variable so the user can choose different starting years in the dashboard. However I have a cost profile which would be exploration and development costs which are usually made in the years preceding the start date (and can continue when production has started). Does anyone know what function/formula I can use to insert the cost profile to start at a defined number of years before the production start date (e.g. five years before production starts, the costs from the cost profile are input into the calculations page).

Hope I explained that well.

Many thanks for any help.