Access is a technical requirement
Components should be positioned so that technicians can inspect and remove them safely with realistic tools and lifting arrangements.
Isolation protects continuity
Valves, bypasses and duty-and-standby arrangements should allow work to proceed while maintaining the required service wherever practical.
Standardisation reduces complexity
Common components, documented spares and consistent operating logic simplify training and improve recovery times across multiple sites.
Maintenance information must be usable
Schedules should define tasks, intervals, acceptance criteria, records and escalation actions rather than simply repeat manufacturer manuals.
A maintainable system is one that anticipates intervention without surrendering its purpose.