Nox-Lumen MfgCase study: AI drawing review
Background: Describes a concrete international façade/window subcontractor rollout. Processes differ per customer; replicate only via the phased services model on the hub page.
One-liner positioning
Machine triage + engineer adjudication. Liberate specialists from brute-force cross-checking dimensions, quantities, glass packs, hardware, etc.—while keeping humans on the hook for reds. Customer idioms accumulate as reusable policy assets.
The assistant never replaces engineer stamps—it asks questions, it does not invent specification values.
Flow
Core capabilities
1. Multi-source parsing
Every ingested datum logs source lineage + calibrated confidence. Low-trust captures stay flagged for human confirmation—“no guessing” on garbage scans.
2. Cross-view reconciliation
| Field group | Tolerance | Escalation |
|---|---|---|
| Width / height (mm) | ±10 mm or ±0.5 % (whichever larger) | 🔴 |
| Counts | exact match | 🔴 |
| Series / profile system | normalized equality | 🔴 |
| Glazing / colour / finish | normalized equality | 🟡 |
| Swing direction | string equality | 🟡 |
| Node references | ref must exist in attachments | 🟡 |
| Naming aesthetics | advisory | 🔵 |
Every conflict lists all observed values + pointer (cell / drawing region) + highlight crops.
3. Three-layer rule stack
| Layer | Owner | Example |
|---|---|---|
| L1 global must-haves | Platform | series, W×H, qty, glass, swing |
| L2 regional codes | Platform (region packs) | AS 2047 wind, GB 50189 thermal, EN 14351 CE |
| L3 customer DNA | PM-maintained | “Customer X mandates LowE+Argon on every pane” |
Each rule is inspectable: clause text, trigger, severity, remediation.
4. Severity & hard gates
| Severity | Meaning | Default | Who clears |
|---|---|---|---|
| 🔴 Critical | numeric mismatch / code breach | Blocks downstream quote & plant | Engineer |
| 🟡 Important | missing / inconsistent finish family | Block unless waiver w/ rationale | Lead sales or engineer |
| 🔵 Informational | naming polish | Log only | — |
Invariant: no job advances with open reds.
5. Clarification composer
Turns technical deltas into sales-friendly bullet prompts with thumbnail evidence. Only questions—no recommended values so reps don’t rubber-stamp dangerous defaults.
6. Approval routing
Escalation patterns combine severity + account tier (customizable). Fire / wind / thermal exposures may require technical director co-sign.
7. Memory & continuous improvement
Auto-ingest waivers, customer habits, false-positive trends. Monthly governance packs highlight rule fatigue or over-tightening.
Comparison vs status quo
| Lens | As-is | Generic PDF AI | CAD-only suites | This stack |
|---|---|---|---|---|
| Ramp | Senior mentoring | DIY glue | Forced CAD adoption | Short training |
| Cycle time | Manual sheet-by-sheet | Partial | Format-locked | Machine triage + human reds only |
| Multi-view | Human eye | Weak | Sometimes | Automated w/ evidence |
| Mandatory fields | Tribal | None | Template-only | L1+L2+L3 stack |
| Customer memory | Mental | None | None | Auto reuse |
| Codes | Scattered | None | Partial libraries | Modular AS/GB/EN |
| Quoting bridge | Manual | None | Some ERP hops | Strong contract handshake |
| Data custody | Owned | Mixed | SaaS hybrids | Dedicated tenant fences |
| Replacing stamps | — | risky CAD vendors | ambiguous | Never |
Promises captured in contract language
Explained evidence, waive-with-reason tooling, sovereign storage, analytics never leak across tenants, deterministic audit logs.
Not in MVP (by design)
| Topic | Reason | Revisit when |
|---|---|---|
| Native DWG/Revit import | MVP uses PDF/tabular payloads | Demand ≥ 10 mandates |
| Autonomous redraw / field stuffing | Liability | Excluded indefinitely |
| Structural / drainage / thermal calcs | Licensed engineer realm | Excluded indefinitely |
Rollout pacing (indicative)
| Phase | Weeks | Highlights | Acceptance |
|---|---|---|---|
| P0 sample lab | ~2 | Baseline parsers on golden projects | Go / no-go report |
| P1 parsing + reco | ~3 | Parsing + reco engines | Recall metrics |
| P2 gates + QA UX | ~3 | Severity + chatter + dashboards | Sales E2E |
| P3 quote coupling | ~1 | Contracts w/ quoting | Fixture sign-off |
| P4 reinforcement | ~2 | Memory autopilot | 30-case burn-in |
~9–11 weeks end-to-end. After P2 (~5–6 wks) sales can consume day-to-day.
Contact info@nox-lumen.com for annexes covering detailed SOW and SLAs.