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Commissioning day: the checklist that actually holds

Most commissioning checklists are written for the inspector, not the crew. Rewriting one around what actually gets skipped cut our snag list by half.

MIMeera IyerField Operations Lead
19 August 20261 min read
Commissioning day: the checklist that actually holds

Checklists written for the wrong reader

Read any commissioning checklist next to a crew actually commissioning, and the mismatch is immediate. The document is ordered by system — DC, AC, monitoring, safety — while the crew moves by location, roof to inverter wall to meter room. Every section boundary is a walk across the site.

The reordering test

Print the checklist. Draw the crew's actual path across the site. If the line crosses itself more than twice, the checklist is ordered for the reader, not the worker.

What gets skipped, and why

StepSkip rateUsual reason
IR test per string22%Done in batches, logged once
Torque check on DC connectors18%No torque value on the sheet
Earth continuity at module frame15%Assumed from rail continuity
Inverter firmware version recorded12%Requires a laptop nobody brought

Three of those four are not discipline problems. They are sheet problems: a missing number, a missing tool, a step that reads as redundant because the sheet never says why it is not.

What we changed

  1. 1Order by location, not by systemRoof, then inverter wall, then meter room. One pass, no backtracking.
  2. 2Put the target value on the lineNot 'torque to spec' but '2.5 Nm'. The spec sheet is in a folder; the checklist is in a hand.
  3. 3Make the photo the recordA timestamped photo of the meter reading beats a transcribed number, and it cannot be filled in from the van afterwards.
The short version
  • Order commissioning steps by where the crew stands, not by which system they belong to.
  • Every measured step needs its target value printed beside it.
  • Photo evidence removes the incentive to reconstruct the sheet later.
Found this useful?All field notes
MI
Meera Iyer
Field Operations Lead

Meera spent nine years commissioning rooftop and ground-mount plants before joining ReDesk to work on field tooling.

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