Multi-stage maintenance request workflow with four approval phases: initial submission by the requester, direct manager review, maintenance department head validation, and final confirmation by maintenance administration. The process includes conditional routing—requests bypass direct manager review if none exists—and mandatory rejection reason documentation at both manager and department head decision points. This structured approval chain ensures accountability, prevents unauthorized maintenance work, and maintains audit trails for compliance. Fork this diagram on Diagrams.so to customize actor roles, add SLA timers, or integrate with your ticketing system. The workflow demonstrates best practices for segregation of duties in maintenance operations.