SNCF: GOC 2.0 architecture audit
Audit, Dynatrace instrumentation and Root Cause Analysis for national rail traffic.
SNCF called on Adservio to audit the GOC 2.0 architecture, instrument its 82 services with Dynatrace + OpenTelemetry and deploy a continuous RCA approach.

Project Context
SNCF's GOC 2.0 programme sits at the heart of the operational management of national rail traffic. Any failure has a direct impact on passengers, freight and the safety of the network.
The architecture, built up over years, had operational and technical blind spots. Incidents took several days to diagnose, due to a lack of end-to-end observability across the 82 services.
The stake: audit the architecture according to TOGAF, instrument via Dynatrace + OpenTelemetry, and put a continuous RCA in place, without ever disrupting rail traffic or degrading operational SLAs.
Strategic Objectives
Critical architecture audit
Audit the architecture of the GOC 2.0 programme (operational traffic management) according to TOGAF, identify critical risks and propose a prioritised action plan.
End-to-end observability
Instrument the 82 application services with Dynatrace + OpenTelemetry to obtain complete visibility over data flows, traces, logs and production metrics.
Root Cause Analysis
Set up a continuous RCA capability combining Dynatrace traces and architecture expertise, to resolve critical rail traffic incidents in a lasting way.
Solutions Delivered by Adservio
Adservio deployed an Architecture + Observability team (TOGAF Architect, SRE Lead, Dynatrace experts, RCA specialist) over 18 months.
Complete TOGAF audit
A methodical audit of the GOC architecture according to TOGAF: data, applications and infrastructure layers. ArchiMate mapping, identification of major risks and a remediation roadmap.
Dynatrace instrumentation
Deployment of Dynatrace OneAgent across the 82 services, configuration of dashboards by business journey (planning, signalling, traffic), and setup of AIOps Davis for automatic anomaly detection.
OpenTelemetry traces
Standardisation of traces on OpenTelemetry for interoperability, end-to-end context propagation and intelligent sampling on high-throughput services.
Continuous RCA
A continuous RCA capability: systematic post-incident analyses, correlation of traces, logs and metrics, blameless postmortems, and the creation of a library of incident patterns to speed up diagnosis.
Prioritised action plan
An action plan validated by the SNCF technical management, structured by layers (data 12 TB/day, applications 82 services, infrastructure on-prem and cloud), prioritised by business criticality.
82 services, 12 TB of traces per day,
a continuous RCA.
Complete TOGAF audit, Dynatrace + OpenTelemetry instrumentation across the 82 services, and a continuous RCA approach: observability as a lever of resilience for national rail traffic.
Results
Application services instrumented with Dynatrace + OpenTelemetry.
Volume of time-series traces processed each day on the GOC 2.0 programme.
Average Root Cause Analysis time on critical incidents.
National rail traffic maintained with no degradation of SLAs.
Data, applications and infrastructure covered by the TOGAF audit.
Duration of the audit, instrumentation and RCA roll-out.
Impact
Validated action plan
A complete action plan validated by the SNCF technical management, covering the 3 layers (data, applications, infrastructure) and prioritised by impact on national rail traffic.
End-to-end observability
82 services instrumented with Dynatrace + OpenTelemetry, complete visibility over data flows and traces: no more blind spots in diagnosis.
Continuous RCA
An operational RCA capability with automatic correlation of traces, logs and metrics. The average RCA time drops from several days to a few hours on critical incidents.
Anticipated anomalies
AIOps Davis identifies subtle anomalies before they become incidents: proactive detection of degradations that would previously have been invisible.
Durable architecture
TOGAF recommendations implemented progressively, transforming the GOC architecture to make it more resilient and easier to evolve over time.
Traffic maintained
Throughout the programme, national rail traffic is maintained without any degradation of SLAs: the audit and RCA do not affect operations.
More Client Work
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