Requirements Engineering & V&V · Rail

From rail contract to a closed safety case.

RR Trace reads your EPC contract, builds the CRS, decomposes it to sub-system SRS, and assigns V&V against the applicable CENELEC and TSI clauses. Then it closes the evidence and rolls hazards up to a verdict — every result reviewable by your engineers.

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On Microsoft Azure, EU data residency Your subsystems, elements & standards Every result engineer-reviewable

Closure_Analysis.xlsx

RequirementClosure

Interlocking response ≤ 250 ms… CLOSED

Headway 90 s under GoA2… PARTIAL

Power margin ≥ 20% peak traction… MISSING

Maintenance plan − 6 months… CLOSED

HAZ-014 · roll-up

2 of 3 SRs closed

OPEN

The Workflow

One pipeline. PDF to a verdict.

Following the rail V-cycle. Seven steps, each one reviewable by your engineers — see any of them in full below.

01

Contract PDF

Any layout, any page count.

02

Generate CRS

Obligations, atomised and attributed.

03

Generate SRS

Sub-system requirements, per element.

04

V&V Analysis

Stage, method, evidence — per clause.

05

Traceability

Every child back to its parent.

06NEW

Evidence Closure

Your documents, judged per stage.

07NEW

Hazard Closure

A status per hazard, rolled up.

Closed safety case

Traceable, evidenced, audit-ready — end to end.

Platform Functions

Six functions. Start where your problem is.

Every one of them a real screen, run on a synthetic contract. Nothing redrawn, nothing mocked up.

Safety Assurance Manager · Prove the chain to the ISA

› Every screen here runs on an independent demonstration project. No client data appears anywhere.

› Columns are yours to show or hide — these screens are trimmed, not cropped.

› Every view here is export-ready: CSV, Excel, or your audit pack.

Safety, end to end

Safety isn't a column. It's a thread.

The safety-related flag is set once and carried consistently from CRS through SRS to V&V — cautious by design, and always justified. Hazards from your log link to their safety requirements, so closure isn't a guess: a hazard closes only when every one of its requirements is genuinely closed.

Consistent & cautious

A three-layer merge eliminates CRS/V&V safety contradictions and catches safety-action items the classifier might miss.

No false closures

A hazard with an un-assessed or unmatched SR can never read CLOSED — it stays OPEN with an explicit reason.

Hazard roll-up · HAZ-014 OPEN

SR-2231 · Emergency braking within 3.2 s CLOSED

SR-2232 · Fail-safe signal aspect on power loss CLOSED

SR-2233 · Overspeed protection at level crossings NOT_ASSESSED

One SR has no matching closure result — hazard cannot be closed on the subset that happened to match.

Enterprise Trust & Architecture

Confidential by design.

Rail contracts are among the most sensitive documents you hold. RR Trace runs on Microsoft Azure with EU data residency — documents segregated per project, deleted on request, and never used to train shared models.

SSO

Microsoft Entra ID + MFA

Single sign-on through Microsoft Entra External ID, with multi-factor authentication enforced via Security Defaults.

RLS

Row-Level Security

PostgreSQL row-level security enforces strict per-client isolation at the database — verified in production.

KV

Key Vault + Managed Identity

Secrets live in Azure Key Vault and are reached through Managed Identity — nothing hard-coded, nothing shared.

AOAI

Azure OpenAI & Embeddings

All AI reasoning and indexing run on Azure. Your prompts and documents stay in our Azure environment and never train shared models.

ADI

Azure Document Intelligence

Contract PDFs are parsed by Azure Document Intelligence — robust extraction, without files ever leaving Azure.

DR

Hardened & recoverable

Per-IP rate limiting, backups with blob soft-delete & versioning, and a disaster-recovery plan with a tested restore.

🔒 Hosted on Microsoft Azure 🚫 Never trains shared models 📍 EU data residency 🗑️ Deleted on request

See your own contract closed.

Bring a real EPC contract and a hazard log. We'll show you the CRS, the V&V, and a live closure roll-up — in minutes.

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