Provide mentoring to the CFO, who is a key stakeholder in the project, and clarify the benefits of an agile approach.

Ask the CEO to intervene by asking for support from the executive board to accelerate the company's transformation.

Apply influence with other key stakeholders on the board to mitigate any risks that may be generated by the CFO's position on the matter.

Submit a report to all key stakeholders on the cost-benefit analysis of the new approach and detail how the company will save money.