Project sponsors have responsibilities throughout projects, not just at the start:
Initiation— Committing resources, providing data, getting work started
Planning support— Providing guidance, validating plans
Execution support— Making decisions, solving problems
Sponsors select projects, but they may not provide needed information. If the project objective is unclear, or the project charter is incomplete or missing, you must fill the gaps. Find out from the sponsor why the project is being undertaken.
Work with the sponsor to identify key stakeholders for the project who depend upon its successful completion. Verify that project infrastructure decisions for reporting and communications planning satisfy sponsor ...