A team member says they are unsure they're working from the latest requirements document—an email was sent a week ago—and previously spent 20+ hours on a file later updated by another team member who didn't send revisions. What should the project manager do to prevent this?

A Project Management Information System (PMIS) provides a centralized, single source of truth for project documents, including requirements. This ensures all team members access the latest versions, preventing rework due to outdated files. Email, as noted in the scenario, is unreliable for version control. While co-location can improve communication, it doesn't solve the version control issue for documents. Revising the communications management plan might suggest better delivery methods, but a PMIS directly addresses the root cause of version control and accessibility. Prohibiting email for requirements is a partial solution; a PMIS offers a comprehensive, structured approach.