The Five Case Model of the UK Green Book

The Five Case Model is a structured, standardized approach recommended by HM Treasury, the Welsh Government, and the UK Office of Government Commerce for developing business cases and is widely used across the public sector and often the private sector. As part of , The Green Book issued by HM Treasury, the model is applicable to policies, strategies, programs, and projects of all sizes. It enhances consistency, clarity, and effectiveness in securing stakeholder or board approval—especially critical when funding is involved

The model comprises five key dimensions:

Strategic Case justifies the need for change and ensures alignment with strategic goals. It includes organizational context, business needs, objectives, potential scope, benefits, and risks.

Economic Case identifies the option that provides the best public value, incorporating social and environmental impacts. It assesses a wide range of options through benefits appraisal, risk analysis, and cost-effectiveness.

Commercial Case demonstrates that the project is commercially viable, outlining procurement strategy, risk sharing, contractual arrangements, and service delivery mechanisms.

Financial Case proves affordability and funding availability, detailing costs, impacts on pricing and financial statements, and stakeholder support.

Management Case ensures the project can be delivered successfully, with robust governance, risk and change management, benefits realization, and evaluation plans.

This model is especially valuable and suitable for both public and private sector projects. Its standardized format increases the credibility and effectiveness of business cases.

Infotica AS brings years of proven expertise in developing robust business cases using the Five Case Model. With deep knowledge across all five dimensions, we help clients craft compelling, structured cases that stand up to scrutiny and drive decision-making. Whether for large-scale public projects or smaller private initiatives, our experienced team ensures your proposal is aligned, evidence-based, and positioned for success. Partner with us to turn your vision into a creditworthy, deliverable reality.