A retail company is migrating its order-management platform to Google Cloud. The engineering team wants to move quickly, but the finance, security, and operations departments each have concerns that have repeatedly stalled progress during ad-hoc email threads and meetings. Deployments to production have twice been delayed because a key stakeholder was unaware of upcoming changes and objected at the last minute. As the cloud architect, you must define a business process that keeps the migration on schedule while ensuring stakeholder concerns are addressed. What is the MOST effective approach?