What should the designer produce to get buy-in from the business stakeholders after creating a cross-cloud prototype?

To effectively gain buy-in from business stakeholders after developing a cross-cloud prototype, producing a business case and roadmap is crucial. A business case provides a clear rationale for the proposed solution, illustrating the benefits, costs, and potential risks associated with the project. It helps stakeholders understand the value proposition and how it aligns with the organization's strategic goals.

Additionally, the roadmap outlines the implementation plan and timeline, detailing the key milestones, necessary resources, and actions required to bring the prototype to fruition. This gives stakeholders clarity on the project's direction and what to expect moving forward. By combining both the business case and the roadmap, the designer can persuasively communicate the project's significance and feasibility, fostering stakeholder commitment and support for the initiative. This strategic approach enhances the likelihood of successful project endorsement and investment.

The other options, while valuable in their own right, do not comprehensively address the need for a strategic justification and action plan that is critical for securing stakeholder buy-in at this stage of the project.