The Stage 3: Detailed Business Case builds on the analysis of options undertaken in Stage 2: Options Analysis. This stage provides more comprehensive and in-depth analysis and evaluation on the preferred option/s to develop conclusive evidence of investment viability or lack thereof and to gain certainty of expected outcomes.

The Stage 3: Detailed Business Case Guide provides information on the implementation, governance and management arrangements for the successful procurement and final delivery of the proposal. Documenting the governance and assurance arrangements for the business case analysis assures investment decision-makers that the appropriate people, expertise and agencies have participated, and robust and evidence-based business case analysis has been undertaken.

Where project conditions do not allow for sequential completion of the previous Stages, Stage 3: Detailed Business Case should be adjusted to ensure that key analyses from earlier Stages inform the proposal’s development.

To assist agencies, a suite of guidance materials supported by templates have been developed, and can be found on the resources and toolkit pages.