CABO · The Framework
The G-O-E-A
Framework.
Four operating pillars — Governance, Operations, Execution, and Assurance — that together define whether a public transport system can demonstrate sustained operational performance.
Why Four Pillars
Operational performance lives in four domains.
Every observable failure in public transport operations traces back to a weakness in one of four domains. G-O-E-A separates those domains so they can be independently assessed, improved, and certified.
A system can be strong in three pillars and fail entirely because of the fourth. CABO requires evidence across all four — which is what distinguishes it from a narrow audit.
Framework Detail
Intent. Scope. Evidence.
Each pillar is defined by its intent, its scope of assessment, and the evidence types required to demonstrate certification readiness.
CABO-G
Governance
Governance Certified
Authority structures, compliance, oversight, decision rights, escalation logic, and institutional control.
View pillar pageScope
- Delegation of authority and decision rights
- Board, committee and executive oversight
- Policy, compliance and statutory reporting
- Escalation protocols and risk governance
- Institutional control of operations
Evidence Types
- Governance charter
- Committee terms of reference
- Decision logs
- Compliance register
- Risk register
CABO-O
Operations
Operations Certified
Service planning, scheduling discipline, resource allocation, operating standards, service design logic.
View pillar pageScope
- Network design and route structuring
- Timetable and vehicle scheduling
- Driver rostering and resource planning
- Operating standards and SOP library
- Service design for demand and accessibility
Evidence Types
- Published timetables
- Scheduling models
- SOPs and operating procedures
- Resource and roster plans
- Service design documentation
CABO-E
Execution
Execution Certified
Dispatch, depot activity, on-the-ground service control, driver and fleet execution, response loops.
View pillar pageScope
- Dispatch discipline and real-time control
- Depot readiness and fleet availability
- Driver execution and shift management
- Incident response and recovery loops
- On-time performance and reliability
Evidence Types
- Dispatch logs
- OCC daily reports
- OTP data
- Incident registers
- Depot readiness records
CABO-A
Assurance
Assurance Certified
Audit cycles, evidence, performance review, re-certification, independent oversight, continuity of compliance.
View pillar pageScope
- Audit cycles and internal assurance
- Evidence portfolio maintenance
- Performance review and reporting
- Re-certification readiness
- Independent oversight and continuity
Evidence Types
- Audit reports
- Assurance statements
- Re-certification packs
- Performance review minutes
- Independent oversight letters
Pillar Interaction
Four pillars, one interlocking system.
The pillars are assessed independently but they do not operate independently. Each feeds the next — and breakdowns compound when a weak pillar undermines a stronger one.
Governance sets the rules
Authority, oversight, and decision rights establish the operating envelope. Without this, Operations has no mandate.
Operations designs the service
Networks, timetables, and standards give the system something executable. Without this, Execution has no plan.
Execution delivers the service
Dispatch, depot, and driver performance turn plans into actual service. Without this, Assurance has nothing to measure.
Assurance closes the loop
Audit, evidence, and review validate performance and feed improvements back into Governance — completing the cycle.