Commissioning — usually abbreviated "Cx" on a set of drawings — is the formal, documented process of verifying that a building's systems actually perform the way the design said they would, before the project is accepted and the contractor is paid the last of what's owed. It is the difference between "the units are installed" and "the units are installed, started up, tested under load, balanced, documented, and signed off."
Every commercial installation trade runs into it. The HVAC contractor commissions the rooftop units and the controls sequence. The fire-alarm contractor commissions the detection and notification system with the AHJ watching. The security and access-control contractor commissions the door hardware, the readers, and the integration to the head end. The AV and low-voltage contractor commissions the room systems and the network. The electrical contractor commissions the gear, the transfer switch, and the emergency power. The solar contractor commissions the array, the inverters, and the utility interconnection. Same word, same structural role on the schedule: the verification gate near the end where the work gets proven, not just finished.
What commissioning actually is
Commissioning is a quality-assurance process that spans the project, not a single inspection at the end. In its full form — defined by ASHRAE Guideline 0, the LEED Fundamental and Enhanced Commissioning credits, and the model energy codes that now require it for most commercial buildings — it starts at design and runs through the first year of occupancy. For the installing contractor, the part that matters most is the back end: pre-functional checklists, startup, functional performance testing, and the issues log that has to get closed before substantial completion.
The core idea is verification against intent. The Owner's Project Requirements (OPR) describe what the building is supposed to do. The Basis of Design (BOD) describes how the engineer intended to achieve it. The submittals describe what the contractor proposed to install. Commissioning is the step that checks the as-installed reality against all three — and produces a paper trail proving it was checked.
Retro-commissioning (RCx) is the same process applied to an existing building that was never properly commissioned or has drifted out of tune. Re-commissioning is a periodic re-verification. Monitoring-based commissioning uses live system data to keep verifying continuously. All three are downstream variants of the same discipline; the installing contractor most often lives in new-construction Cx and occasionally gets pulled into RCx on a retrofit.
Who runs it — the commissioning authority
The commissioning authority (CxA, sometimes CA) is the party responsible for leading and documenting the process. On a LEED or larger commercial project, the CxA is typically a third party contracted by the owner — independent of the design team and the contractor specifically so the verification has teeth. On smaller jobs, the engineer of record or the controls contractor may carry the role.
The installing contractor is not the commissioning authority, but the contractor's work is the thing being commissioned — which means the contractor carries most of the labor. The CxA writes the commissioning plan and the functional test scripts; the contractor performs the pre-functional checks, runs startup, demonstrates each test, captures the data, and resolves every deficiency the CxA logs. The contractor who treats commissioning as paperwork the CxA handles is the contractor whose retention sits unpaid for two extra months.
On public and AHJ-witnessed systems — fire alarm above all — the authority having jurisdiction is also in the room. NFPA 72 requires a documented record of completion and an acceptance test witnessed by the AHJ. That acceptance test is commissioning by another name, and failing it stops the certificate of occupancy cold.
What's in the commissioning documentation
The commissioning record is a stack of specific, named documents, and each trade owes its piece. Pre-functional checklists (PFCs) confirm each device was installed, connected, and ready before testing — the boring foundation that catches the loose lug and the missing damper before functional testing wastes a day. Startup reports capture the manufacturer's commissioning of major equipment. Functional performance test (FPT) records document each system run through its sequences under real conditions, with measured results recorded against expected results.
The issues or deficiency log is the live document during commissioning — every item the CxA finds that doesn't meet the test, tracked open-to-closed with the responsible party named. The final commissioning report rolls it all up: what was tested, what passed, what failed and how it was corrected, and the systems manual the owner inherits. Alongside it ride the closeout deliverables the contractor owes regardless of formal Cx: as-built drawings reflecting what was actually installed, approved submittals, O&M manuals, warranties, and owner-training records.
These documents are not optional decoration. On most commercial contracts, substantial completion, the certificate of occupancy, final payment, and release of retention are all contractually gated on the commissioning record being complete and accepted. The work being physically done is necessary but not sufficient — the documentation is what converts finished work into a paid invoice.
Why it strands money
Commissioning is where well-run installs go to die a slow death in closeout. The crew finished the work weeks ago and moved to the next job. The functional tests got run but the data lives in a tech's photos and a half-finished spreadsheet. The deficiency log has four open items that each need a thirty-minute return trip nobody scheduled. The as-builts were going to get marked up "later." The O&M manual is a PDF in someone's email. And retention — often five to ten percent of a large contract — sits unreleased because the owner's CxA is still waiting on the report.
The structural problem is that commissioning documentation is generated in the field, by the people doing the work, at the moment the work is verified — but it usually gets assembled at a desk, weeks later, by someone reconstructing what happened from memory and scattered photos. Every day between the test and the document is a day the detail degrades and the closeout slips. For a contractor running several jobs into closeout simultaneously, the stranded-retention pile becomes a real and recurring cash-flow problem hiding inside "finished" work.
It compounds with the rest of the closeout burden. Change-orders that never got billed, certified payroll filings still owed on a public job, punch-list items, warranty registrations — commissioning sits in the same crowded window where the contractor is trying to get paid and start the next job at the same time. The trades that close out fastest are the ones where the field record was complete the day the work was.
How Forge handles it
Forge is one operating system for commercial installation contractors — estimating, scheduling, CRM, field ops, treasury, and documents in one chest rather than a half-dozen integrated tools. Commissioning lives in the documents drawer — Plate — which carries submittals, as-builts, and commissioning records as native artifacts of a project rather than files bolted on from a separate service. Because they share the same project record as the estimate, the schedule, the crew assignments, and the change-orders, the commissioning record is built against ground-truth instead of reconstructed from it.
The field-ops and crew-tracking side captures the work as it happens — who was on site and what got installed — so the closeout record is assembled from what the field actually logged rather than from a tech's memory at a desk two weeks later. Plate holds the commissioning record itself — test results, sign-offs, training receipts, warranty start dates — packaged as the turnover binder the owner inherits. Hyperion's spatial scan, where a vertical uses it, gives the as-built a measured geometric record of the installed condition rather than a marked-up copy of the design set. And because Treasury — the payroll and billing drawer — shares the same project record, the closeout documents that gate final payment and retention release sit next to the invoice they unlock, not in a separate system the bookkeeper has to chase.
An honest scope note: Forge does not replace the commissioning authority, write your functional test scripts, or stand in for the AHJ's acceptance test. The discipline of commissioning is the engineer's and the CxA's, and Forge does not pretend otherwise. What Forge changes is the part the contractor actually owns — capturing the field record once, keeping the deficiency log and the closeout deliverables attached to the live project, and turning a verified install into a complete, billable, retention-releasing record without the multi-week desk reconstruction. The verification gate doesn't move; the documentation that gets you through it stops being the thing that strands your last payment.
Where commissioning differs by trade
The word is constant but the gate is trade-specific, and the contractor evaluating tooling should expect the depth to differ. HVAC commissioning is the most procedurally heavy — air and water balancing, control-sequence verification, and integrated systems testing where the units, the controls, and the building automation system all have to prove they cooperate. Fire-alarm commissioning is the most consequential to schedule, because the NFPA 72 acceptance test is AHJ-witnessed and a failed test stops occupancy. Security and access-control commissioning centers on device-by-device verification and integration to the head end. AV and low-voltage commissioning proves room systems and signal paths. Electrical commissioning covers gear, protection, and emergency-power transfer. Solar commissioning ends at the utility interconnection and the production verification.
Forge ships today for roofing, security and fire, AV and low-voltage, solar, HVAC, and electrical — the trades where commissioning is a contractual gate on getting paid. The vertical pages below cover how each trade's specific closeout and field workflow is handled. For trades Forge is still expanding into, the documents drawer is the same chest; Charter members shape the trade-specific test and closeout templates first.
The common thread across every trade is the same one that runs through certified payroll, change-orders, and as-builts: the work being done is the easy part. The record that proves it was done right — captured at the moment it was true, attached to the project it belongs to, and complete on the day the crew rolls off — is what closes the job and releases the money. Commissioning is that record at its most formal, and it is exactly the kind of work a unified system is built to carry.