Fewer Defects at Handover. Assisted by AI.

Name: CxCheck
Author: Craig McMahon

Forensic review of sequence of operations, FPT and IST scripts and MEPF submittals. Built for independent CxAs, consultancies and project teams alike.

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THE FORENSIC ENGINE

Verification at Scale

CxCheck cross-references contractor scripts against decades of site-proven logic, method statements and global standards. Catching the sequencing errors that manual reviews miss.

crac_startup_script.py - SOURCE

1def start_crac_unit(unit_id, mode):

2 config = load_config(unit_id)

3 if mode == "staged_cooling":

4 delay = config.get("compressor_stage_delay", 0)

5 # WARNING: No upper-bound check on staging delay[LOGIC GAP DETECTED]

6 stage_compressor(unit_id, delay)

7 verify_supply_air_temp(unit_id)

8 log_event("crac_startup_complete")

cxcheck_engine - ANALYSIS

> Scanning crac_startup_script.py...

> Cross-referencing SoO against CRAC L4 FPT protocols...

> Validating manufacturer datasheets & staging logic...

▌

> Analysis complete. 1 critical finding.

MISSION-CRITICAL RISK MITIGATION: VERIFIED

Who CxCheck Is For

For Individual Engineers

You run commissioning reviews solo and need a second pair of forensic eyes on every script and submittal before it goes out the door.

See the Solo tier

For Commissioning Firms

Your practice reviews dozens of scripts a month. CxCheck scales your review capacity without scaling your headcount.

See the Practice tier

For Project Teams

You are delivering a data center and need every L4/L5 document verified against design intent, with a record that stands up to audit.

See the Project tier

A commissioning tool built for MEPF work. Purpose-built for mission-critical MEPF systems with AI workflows at its core, CxCheck supports document review and verification through every commissioning level.

FIG 0.2

Controlled Data Handling

Project data is encrypted in transit and at rest and isolated per organization. Analysis runs on hardware we own - never on a third-party AI provider.

FIG 0.3

Neural Standards Vault

Instant cross-referencing of your documents against Cx, ASHRAE, IEEE, International and local building codes.

FIG 0.4

Universal Logic Engine

CxCheck is designed to reduce language barriers, translating technical scripts and audit logs into the working language of teams on site, from China to Thailand to the Philippines.

Seven Levels of Commissioning

Design Review

FAT

QA/QC

SAT

FPT

IST

Handover

L0–L6 Absolute Visibility

SOVEREIGN AUDIT LOG

ILLUSTRATIVE EXAMPLE

Sample data shown for illustration only. Not a real project.

L0DESIGN REVIEWVerified

L0 Schematic logic check complete. OPR/BOD alignment verified across all disciplines.

48/50 VERIFIED

L1FACTORY ACCEPTANCE TESTING (FAT)At Risk

L1 Factory Acceptance Testing: Chiller components delayed. 41 units received on-site.

41/50 VERIFIED

L2INSTALLATION QA/QCIn Progress

L2 Installation QA/QC: PFCs running 85% on plant room wiring. Field verification on-track.

37/50 VERIFIED

L3SITE ACCEPTANCE TESTING (SAT)Pending

L3 Site Acceptance Testing: SAT prep scheduled for cooling tower sequences next week.

30/50 VERIFIED

L4FUNCTIONAL PERFORMANCE TEST (FPT)Scheduled

L4 Functional Performance Test window confirmed. Load bank test protocols ready.

22/50 VERIFIED

L5INTEGRATED SYSTEMS TEST (IST)Planned

L5 Integrated Systems Test being detailed. System-of-systems interaction scenarios mapped.

14/50 VERIFIED

L6PROJECT HANDOVERPlanned

L6 Project Handover sequence planned. O&M documentation and training schedule ready.

6/50 VERIFIED

Completion by commissioning level

ILLUSTRATIVE EXAMPLE

Sample data shown for illustration only. Not a real project.

L0:Design Review|48/50VERIFIED (96%)

L1:Factory Acceptance Testing (FAT)|41/50VERIFIED (82%)

L2:Installation QA/QC|37/50VERIFIED (74%)

L3:Site Acceptance Testing (SAT)|30/50VERIFIED (60%)

L4:Functional Performance Test (FPT)|22/50VERIFIED (44%)

L5:Integrated Systems Test (IST)|14/50VERIFIED (28%)

L6:Project Handover|6/50VERIFIED (12%)

CxCheck was built for the way commissioning actually happens: documents first, then site. Every sequence of operation, every FPT and IST script, every MEPF submittal gets a forensic review against design intent and global standards - before the first load bank is energized. The result is fewer surprises at handover, and a record that proves it.

INFRASTRUCTURE

A Sovereign Service.
Stated plainly.

CxCheck is built as a sovereign service. Document analysis runs on hardware we own and control - your documents are never sent to third-party AI providers and are never used to train public models. For approved enterprise projects, CxCheck can be deployed on dedicated hardware inside your own facility.

Sovereign Hosted

Available now - the standard service

Document analysis runs on inference hardware CxCheck owns and controls, using locally hosted models.
No third-party AI provider - OpenAI, Anthropic, Google or any other hosted model API - ever receives your documents.
Project records and uploads are encrypted in transit (TLS) and at rest, isolated per organization by row-level security and role-based permissions.
Your documents are never used to train any model and are never shared with third parties.

On-Site Node

In development - approved enterprise projects

Dedicated hardware supplied pre-configured and operated inside your own facility, licensed on a subscription basis.
Documents are stored on that node and inference runs on it, inside your network boundary.
This tier is not how standard customers are served. It is scoped per engagement and subject to technical review and a signed agreement.
Talk to us before assuming a project qualifies - we confirm in writing what runs where.

Read the full architecture & data security page

No Third-Party AI

Your documents are never sent to OpenAI, Anthropic, Google or any other hosted model API and are never used to train public models.

Hardware We Own

Document analysis runs on inference hardware CxCheck owns and controls, not on a rented general-purpose model service.

Audited Access

Per-organization isolation, role-based permissions and an audit trail record who accessed or changed project records.

FIG 0.5A

Forensic Technical Debt Detection

Identify hidden operational risks across the full L0–L6 lifecycle. CxCheck parses all documentation to pinpoint logic gaps and sequencing shortcuts that threaten your IST performance and final handover milestones.

Reliability Engineering

CxCheck Platform

FIG 0.5B

Shift-Left Reliability Engineering

Designed to surface IST failure modes earlier. By verifying operational intent at L0, the platform aims to reduce downstream testing conflicts, helping teams find issues in L4 FPT and L5 IST sequences before they reach the site.

Shift-Left Methodology

CxCheck Platform

About the Founder

Background & Pedigree

Craig McMahon is a Senior Commissioning Manager with two decades of hands-on experience delivering mission-critical data center and commercial building projects across Asia-Pacific, from design review through L6 handover.

He founded CxCheck after watching commissioning defects surface at IST - the most expensive phase to fix them - and seeing how much of that risk is already visible in the documents. CxCheck exists to surface those gaps earlier, using AI-assisted forensic review on infrastructure the company owns and controls, so teams can verify design intent before it reaches the site.

The Security Manifesto

Your documents are the most sensitive artifacts in a mission-critical project. They never leave our control. Analysis runs on hardware we own, with locally hosted models, per-organization isolation and an audit trail - no third-party AI provider, no training on your data, no exceptions.

The CxCheck Solution

CxCheck pairs forensic, AI-assisted document review with sovereign infrastructure - so commissioning teams can verify sequence of operations, FPT and IST scripts against design intent before they reach the site, without sending project documents to third-party AI providers.

Frequently Asked Questions

What does CxCheck review?

Sequences of operations, FPT and IST scripts, and MEPF submittals. Each document set is cross-referenced against design intent and global commissioning standards, and every gap is logged with a citation.

Where do my documents go?

Nowhere you don't want them to. Analysis runs on hardware CxCheck owns and controls, with locally hosted models. Your documents are never sent to third-party AI providers.

How is an audit priced?

One document set submitted for review is one audit. See the pricing page for tier allowances and overage rates.

Priority Access: Solo, Practice, Project and Dedicated Node Tiers Opening Soon

Ready to transform your commissioning workflow?

Join commissioning teams who are delivering projects faster with CxCheck.

Founding pricing: closes 30 September 2026 — founding rates lock in for early teams.