/ Engineering · Maintenance
The AMC cadence,
documented and tiered.
Maintenance is not a phone number; it is a documented cadence of inspections, preventive replacements, firmware reviews and incident response.
- Cadence stages
- 4
- Principles
- 1
- Reviewed
- 2026-05-17
- Artefact
- AMC pack
/ Maintenance workflow
Maintenance workflow — AMC tier cadence
The annual maintenance cadence we run against an AMC contract — scheduled inspections, preventive replacements, firmware reviews and incident response.
Maintenance is the day-two discipline of the practice. An AMC contract is not a phone number; it is a documented cadence of scheduled inspections, preventive replacements and firmware reviews, with a clear incident-response tier behind it. The discipline is the cadence — when did we last test the battery autonomy on the BESS, when did we last sweep the Cat6A channels, when did we last walk the addressable loop. The workflow below is the tier-1 cadence; tiered upgrades shorten the inspection interval and add 24/7 incident response.
Stage 1
Scheduled site inspection
Walk the building against the AMC checklist — visual, electrical and integration spot checks.
- Outputs
- Inspection record · Updated punch list
- Gates
- Inspection record acknowledged by FM team
- Duration
- 1 day (quarterly cadence)
Stage 2
Preventive replacement window
Replace components that are at the end of their wear-life — UPS batteries, smoke detectors past EOL, sealed-bearing fans, gateway flash memory.
- Outputs
- Replacement record · Updated component lifecycle register
- Gates
- Replacement record acknowledged by FM team
- Duration
- 2–5 days (annual)
Stage 3
Firmware review window
Review device firmware against the manufacturer release notes — patch security advisories, defer feature-only releases.
- Outputs
- Patch decision log · Updated device firmware register
- Gates
- Patch decision log acknowledged by lead engineer
- Duration
- 1 day (semi-annual)
Stage 4
Incident response
Respond to incidents within the AMC tier SLA. Each incident produces a closure note that updates the trend report.
- Outputs
- Incident closure note · Updated trend report
- Gates
- Incident closure acknowledged by FM team
- Duration
- Per AMC SLA
/ Maintenance principles
The principles behind the AMC discipline
Preventive maintenance over reactive response
An AMC measured by ticket-close-time is failing; an AMC measured by preventive-event-cadence is working.
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