Four-phase maintenance request workflow with sequential approval gates from requestor through direct manager, maintenance department head, and maintenance director. Requests flow through Phase 1 submission, Phase 2 direct manager review with approval/rejection decision, Phase 3 maintenance head evaluation and result documentation, and Phase 4 final approval and work completion confirmation. This structured process ensures accountability, mandatory rejection documentation, and clear escalation paths—critical for organizations managing facility maintenance at scale. Fork this diagram on Diagrams.so to customize approval roles, add SLA timers, or integrate with your ticketing system. The mandatory rejection reason requirement prevents incomplete closure and supports audit compliance.