If I have understood this question correctly, our main tool is CBAx, a cost benefit analysis tool which provides common values for costs and benefits so that line Ministries can monetise their impacts when seeking new funding. The link to the tool can be found here: https://www.treasury.govt.nz/information-and-services/state-sector-leadership/investment-management/plan-investment-choices/cost-benefit-analysis-including-public-sector-discount-rates/treasurys-cbax-tool