A key stakeholder cannot attend the project vision statement development workshop.

Emphasize to the stakeholder that a common, detailed vision will better ensure team understanding of the project.

Personally meet with the stakeholder to understand their requirements, and then share the vision with the team.

Work with the team to create a vision from the stakeholder's supplied requirements.

Explain to the team that creating a vision is not critical in agile projects, as requirements may change over time.