EPI CDFOS Study Guide — Certified Data Centre Facilities Operations Specialist Exam Prep

Pass the EPI CDFOS exam with a study guide written for the people who actually run data centres day to day.

The CDFOS (Certified Data Centre Facilities Operations Specialist) is EPI's specialist-level operations certification — the hands-on entry point of the Maintenance/Operations track, and the course the management-level CDFOM builds on. It tests whether you can execute daily operations correctly: handovers, walk-arounds, lock-out/tag-out, permits to work, maintenance procedures, floor discipline, monitoring response and the records that prove it all happened. This guide teaches all nine official syllabus modules in plain language, with the step sequences, comparisons and judgement calls the exam actually tests.

What's inside:

• All 9 official CDFOS syllabus modules across 6 chapters (~50,000 words)

• Service level management as the specialist lives it: needs analysis, capability assessment, portfolio vs catalogue, SLA data points and the availability math (work the downtime budgets for 99.9% → 99.999% until they're automatic)

• Safety & crisis management: accident causes, the hierarchy of controls, the OH&S manual, calibration — and lock-out/tag-out taught as a full step-by-step sequence, plus permit to work and emergency response plans

• Physical security: layered zones, patrols that actually look, deliveries and holding areas, badge and key discipline, incident reporting

• Facilities maintenance: preventive vs predictive vs condition-based vs run-to-failure compared honestly, MOP anatomy (including the rollback step), service reports, critical spares, housekeeping as contamination control

• Operations & monitoring: the complete shift handover, walk-around duties, release and configuration discipline, floor management, equipment life cycle, the monitoring and notification matrices, time-based escalation

• Projects & sustainability: the project phases in order, change control, handover to operations — plus PUE, DCiE, CUE, WUE and REF with worked calculations and each metric's blind spot

• Governance & compliance: the six sub-processes of document management and the asset record contents, taught as daily practice

• Exam traps flagged throughout: "highly recommended" vs required, permit controls the job / LOTO controls the energy, complaint ≠ incident, record reality not intentions

Real exam format: 60 multiple-choice questions, 90 minutes, closed-book. Passing mark: 42 out of 60. Exam accredited by EXIN; certificate valid 3 years. No certificate prerequisite — operations experience is advisable, and EPI highly recommends DCFC/CDCP first. The course is fully aligned with the DCOS standard.

Independent study material. Not affiliated with or endorsed by EPI.

Want the full system — 500-question practice bank, cheat sheets, study plan and audio walkthroughs, plus our online exam hub? Step up to Deluxe or Complete.