Electrical system commissioning process map

What is in this map

15 steps across 5 swimlanes and 4 phases, with 3 decision points.

Swimlanes (who does the work)

Field Electrical, QA / Test & Inspection, Commissioning Engineer, Engineering and Customer

Phases (left to right)

Pre-Energization Inspection & Testing, Energization, Functional Testing and Reporting & Handover

Why map this process

Commissioning is the point where a finished-looking installation either proves itself or doesn't, and the map is built around the one decision that actually carries the risk: energization approval. The row's own note is blunt about why — energizing a system that hasn't cleared insulation and continuity testing, or that hasn't been formally authorized, can destroy equipment or injure whoever is nearest the panel. That gate sits on the page as its own diamond rather than being folded into a general 'ready to commission' checkbox, because it is the row a customer under schedule pressure will ask to skip.

The map also separates 'tests passed' from 'approved to energize' as two different facts, and separates energizing from proving the system actually works under load as two different phases. A chart that collapsed all three into one 'commissioning complete' step would hide which of them failed on the one visit that didn't go cleanly.

Every step in the map

This is the spreadsheet behind the diagram. The numbers in “Goes to” are row numbers, which is exactly what the editor’s “Line to” column holds — so you can read the flow here and retype any part of it.

The decision points

Every branch in the map, with the label on each outgoing line. These are the questions the process has to be able to answer.

• 4. Continuity and insulation test results **pass?**

  Owned by QA / Test & Inspection · Pre-Energization Inspection & Testing

  • Pass → step 6
  • Fail → step 5

• 7. **Energization approved** by responsible engineer?

  Owned by Engineering · Energization

  • Approved → step 9
  • Not approved → step 8

• 11. Faults found during functional testing?

  Owned by QA / Test & Inspection · Functional Testing

  • Yes → step 12
  • No → step 13

Notes on specific steps

These notes travel with the map. In the editor they live in the Notes column and appear when you open a box.

1. Installation complete, ready for commissioning

Confirms the handoff from the Marine Electrical Installation SOP: commissioning does not start on a general sense that the work looks finished, only on this specific sign-off that installation is complete.

4. Continuity and insulation test results **pass?**

Readings are checked against the values specified for the installed cable and equipment ratings, not against a generic pass/fail feel for the meter.

7. **Energization approved** by responsible engineer?

Energizing a system that has not cleared insulation and continuity testing, or that has not been formally authorized, can destroy connected equipment or injure whoever is nearest the panel when it goes live. This sign-off is required regardless of schedule pressure.

12. Diagnose and resolve fault

A tripped breaker, a motor rotating the wrong direction, a sensor reading out of range, logged with the symptom and the fix, not just closed out, so the commissioning report can show what was actually found.

Making it yours

Phases run Pre-Energization Inspection & Testing → Energization → Functional Testing → Reporting & Handover in the Horizontal lane column; roles run Field Electrical, QA/Test & Inspection, Commissioning Engineer, Engineering and Customer in the Vertical lane. When adapting it, keep the energization-approval decision as its own row even if in your operation the same person does the testing and the approving — the point of the row is the sign-off existing as a discrete, recorded act, not that two different people have to be involved.

What to watch out for

• Don't let 'submit test results' and 'energization approved' become one row. The map keeps them separate on purpose: a hold on approval routes back to resolving the outstanding issue, which only works as a distinct branch if the request and the decision are two different steps a reader can see stall independently.
• The functional-testing fault loop returns to 'diagnose and resolve fault,' not to the start of testing. If your version routes a fault straight back to energization, you lose the record of what was actually found and fixed, which is exactly the content the commissioning report is supposed to carry.
• Don't skip the visual inspection before continuity and insulation testing. It's a cheap check that catches damage or an obviously wrong connection before an electrical test wastes time confirming something a five-minute look would have caught.

Frequently asked questions