Four-phase maintenance request workflow with multi-level approval gates across submitter, direct manager, maintenance department head, and maintenance director roles. Requests flow through mandatory review checkpoints where approvers can accept or reject with documented reasons, with rejection paths terminating the request at any stage. This structured approval process ensures accountability, proper authorization, and complete documentation of maintenance work from submission through final completion confirmation. Fork this diagram on Diagrams.so to customize role names, add SLA timelines, or integrate with your ticketing system. The mandatory rejection reason requirement prevents incomplete closures and supports audit compliance.