What are Project Management's three integration scenarios?

• Project assignment — assign Solution Documentation + issue-management entities to a project.
• Implementation — start implementation by creating an RfC/change document/IT requirement from a project task, or attach an existing transaction.
• Maintenance — create a project task from an RfC/change document, folding small changes into project planning/monitoring.

The project-task ↔ business-transaction relationship goes both ways.