[OR] [BDCB] [E3] [CBS] [1] [MII] Map Interconnections and Interdependencies

Written by Dr Goh Moh Heng | Jul 30, 2026, 8:42:45 AM

CBS-1 Payment & Settlement Systems

Introduction

The delivery of CBS-1 Payment & Settlement Systems by the Brunei Darussalam Central Bank (BDCB) depends upon a highly interconnected operating environment comprising business processes, technology platforms, specialist personnel, information assets, facilities, external participants, and regulatory oversight functions.

While each Sub-Critical Business Service (Sub-CBS) performs a distinct operational role, no individual process operates independently. Instead, every process relies upon upstream inputs, downstream recipients, and numerous internal and external dependencies that collectively enable the secure, reliable, and timely operation of Brunei's national payment and settlement infrastructure.

Mapping these interconnections and interdependencies provides an end-to-end understanding of how the Critical Business Service is delivered.

It enables BDCB to identify critical operational relationships, dependencies on technology and third parties, potential concentration risks, and single points of failure that could impair the availability or integrity of payment and settlement services.

This mapping also supports the identification of critical hand-offs between operational teams, business functions, and external financial institutions.

From an Operational Resilience perspective, this mapping forms an essential component of resilience planning.

It provides the evidence required to support impact tolerance assessments, dependency analysis, scenario design, business continuity planning, and resilience improvement initiatives.

Furthermore, a structured dependency map demonstrates to regulators and supervisory authorities that BDCB has developed a comprehensive understanding of the operational ecosystem supporting one of its most critical financial market infrastructure services.

Table 2: Map Interconnections

Name of Sub-CBS	Connected Component	Connection Type	Interconnection Description	Upstream Interconnections	Downstream Interconnections
CBS-1.1 Payment Participant Management	Participating financial institutions, Registration and Compliance functions	Process / Organisation	Registers, authorises and administers payment system participants before operational access is granted.	Regulatory approvals, participant applications, onboarding documentation	CBS-1.2, CBS-1.3, participant access administration
CBS-1.2 Payment Instruction Submission	Payment channels, Participant interfaces	Process / Technology	Receives payment instructions through secure communication channels for processing.	CBS-1.1 participant enrolment, payment instructions from banks	CBS-1.3 validation, CBS-1.5 processing queue
CBS-1.3 Transaction Validation and Authentication	Authentication services, Validation engines	Process / Technology	Verifies message authenticity, integrity and compliance before processing.	CBS-1.2 submitted transactions, participant credentials	CBS-1.4 liquidity verification, CBS-1.5 routing
CBS-1.4 Liquidity and Funds Availability Management	Settlement accounts, Liquidity monitoring	Process / Financial Control	Confirms settlement balances and liquidity sufficiency before settlement execution.	CBS-1.3 validated transactions, account balances	CBS-1.5, CBS-1.6 RTGS, CBS-1.7 DNS
CBS-1.5 Payment Processing and Routing	Payment Processing Platform	Process / Technology	Directs validated payments to the appropriate settlement mechanism based on business rules.	CBS-1.3, CBS-1.4	CBS-1.6 RTGS, CBS-1.7 DNS
CBS-1.6 RTGS Processing	Settlement Engine	Process	Performs immediate gross settlement of eligible high-value transactions.	CBS-1.5 routing, liquidity confirmation	CBS-1.8 settlement confirmation
CBS-1.7 Deferred Net Settlement Processing	Netting Engine	Process	Calculates multilateral net positions and executes scheduled settlement cycles.	CBS-1.5 routing, liquidity availability	CBS-1.8 settlement confirmation
CBS-1.8 Settlement Finalisation and Confirmation	Settlement Accounts, Notification Services	Process	Records final settlement and distributes confirmation to participating institutions.	CBS-1.6, CBS-1.7	CBS-1.9 exception handling (where required), CBS-1.14 reporting
CBS-1.9 Exception and Failed Transaction Management	Operations Support, Participant Communications	Process	Investigates and resolves failed, delayed, or rejected payment transactions.	CBS-1.8 exceptions, operational alerts	CBS-1.10 monitoring, participant notifications
CBS-1.10 Settlement Risk Monitoring and Control	Risk Management, Monitoring Platforms	Process / Risk	Continuously monitors settlement exposures, queues and operational risk indicators.	Transaction processing data, CBS-1.9 incidents	CBS-1.11 oversight, CBS-1.12 incident management
CBS-1.11 Payment System Oversight and Compliance Monitoring	Compliance, Supervisory Functions	Governance	Oversees participant compliance with payment system rules and operational standards.	CBS-1.10 Monitoring information, participant reports	Management reporting, regulatory oversight, improvement actions
CBS-1.12 Operational Incident and Service Disruption Management	Incident Response Teams	Operational Resilience	Coordinates operational response during technology failures or service disruptions.	System alerts, CBS-1.10 monitoring, CBS-1.11 escalation	CBS-1.13 recovery, executive escalation
CBS-1.13 Business Continuity and Service Recovery	BCM, Disaster Recovery	Operational Resilience	Restores payment services following disruption using approved recovery strategies.	Incident declaration, recovery activation	CBS-1.14 Reporting, restoration of all operational Sub-CBS
CBS-1.14 Settlement Reporting and Regulatory Information Management	Reporting Platforms	Governance / Information	Produces operational, management and regulatory reports relating to payment activities.	Settlement results, recovery status, transaction history	Senior Management, regulators, audit, CBS-1.15
CBS-1.15 Post-Settlement Review and Continuous Improvement	Governance Committees	Continuous Improvement	Reviews operational performance, lessons learned and resilience improvements.	CBS-1.14 reports, incident reviews, audit findings	Process improvements across all CBS-1 Sub-CBS

Table 2: Map of Interdependencies

Name of Sub-CBS	People	Systems and Technology	Data and Information Flows	Facilities	Third Parties / External Entities	Interconnected CBS	Nature of Dependency	Disruption Impact
CBS-1.1 Payment Participant Management	Payment Operations, Compliance Officers	Participant Management System, Identity & Access Management	Participant profiles, approvals	Head Office, Operations Centre	Licensed financial institutions	CBS-2 Financial Market Operations, CBS-5 Regulatory Supervision	Accurate participant registration is prerequisite for payment access.	Unauthorised access or delayed onboarding prevents transaction participation.
CBS-1.2 Payment Instruction Submission	Payment Operations Analysts	Secure Messaging Gateway, Payment Processing Platform	Payment instructions, transaction metadata	Primary Data Centre	Participating banks	CBS-3 Digital Financial Services*	Continuous submission channels are required for payment initiation.	Payment instructions cannot enter the settlement process.
CBS-1.3 Transaction Validation and Authentication	Security Analysts, Operations Staff	Authentication Services, Validation Engine	Digital credentials, validation records	Data Centre	Financial institutions	CBS-6 Cybersecurity Operations*	Depends upon trusted identity verification and message integrity.	Invalid or fraudulent transactions may enter processing or legitimate payments may be rejected.
CBS-1.4 Liquidity and Funds Availability Management	Treasury Specialists	Settlement Account Platform	Account balances, liquidity positions	Operations Centre	Settlement participants	CBS-4 Financial Management*	Settlement depends upon available liquidity.	Payments may queue, delay or fail settlement.
CBS-1.5 Payment Processing and Routing	Payment Operations Team	Payment Processing Platform	Routing rules, processing queues	Primary Processing Site	Financial institutions	CBS-3 Digital Financial Services*	Central orchestration point linking payment initiation to settlement. Concentration Point.	Significant degradation affects most downstream payment services.
CBS-1.6 RTGS Processing	Settlement Specialists	RTGS Settlement Engine	High-value settlement transactions	Primary & DR Data Centres	Participating banks	CBS-4 Financial Management*	Immediate settlement depends on RTGS engine availability.	High-value payment settlement ceases.
CBS-1.7 Deferred Net Settlement Processing	Settlement Analysts	Net Settlement Engine	Net settlement positions	Data Centre	Clearing participants	CBS-4 Financial Management*	Scheduled settlement depends upon accurate net calculations.	Settlement cycles are delayed or incomplete.
CBS-1.8 Settlement Finalisation and Confirmation	Settlement Officers	Settlement Database, Notification Platform	Settlement confirmations	Operations Centre	Financial institutions	CBS-3 Digital Financial Services*	Finality records must remain accurate and available.	Participants lack confirmation of completed settlements.
CBS-1.9 Exception and Failed Transaction Management	Operations Support Team	Case Management Platform	Exception logs, investigation records	Operations Centre	Financial institutions	CBS-7 Customer & Stakeholder Communications*	Depends on timely operational coordination and participant engagement.	Unresolved exceptions accumulate and increase operational risk.
CBS-1.10 Settlement Risk Monitoring and Control	Risk Analysts	Operational Monitoring Platform	Operational metrics, risk indicators	Monitoring Centre	Market participants	CBS-8 Enterprise Risk Management*	Requires continuous visibility across payment activities.	Emerging risks remain undetected, increasing systemic exposure.
CBS-1.11 Payment System Oversight and Compliance Monitoring	Supervisors, Compliance Officers	Regulatory Reporting Platform	Compliance reports, supervisory data	Head Office	Regulators, participating institutions	CBS-9 Regulatory Reporting*	Supervisory oversight depends upon reliable operational information.	Regulatory obligations may not be fulfilled.
CBS-1.12 Operational Incident and Service Disruption Management	Incident Managers, Technical Specialists	Incident Management Platform	Incident records, escalation logs	Crisis Management Centre	Critical service providers	CBS-10 Crisis Management*	Coordinates response across all operational stakeholders. Critical Hand-off between operations and recovery teams.	Incident response becomes delayed, increasing service disruption duration.
CBS-1.13 Business Continuity and Service Recovery	BCM Team, Infrastructure Engineers	Disaster Recovery Platform, Backup Infrastructure	Recovery procedures, backup data	Alternate Processing Site	Telecommunications and infrastructure providers	CBS-10 Crisis Management, CBS-11 Technology Services	Recovery depends upon alternate facilities and replicated infrastructure. Single Point Dependency: recovery site readiness.	Extended outage exceeding impact tolerance.
CBS-1.14 Settlement Reporting and Regulatory Information Management	Reporting Analysts	Regulatory Reporting Platform, Data Warehouse	Settlement reports, audit logs	Head Office	Regulators, auditors	CBS-9 Regulatory Reporting*	Accurate operational reporting depends upon complete settlement data.	Regulatory reporting delays and reduced management visibility.
CBS-1.15 Post-Settlement Review and Continuous Improvement	Senior Management, Operational Resilience Team	Governance & Document Management Systems	Lessons learned, KPI reports	Head Office	External auditors (where applicable)	All CBS	Continuous improvement depends on accurate performance and incident information collected across the service lifecycle.	Recurrent weaknesses remain unresolved, reducing long-term operational resilience.

Note: The references to other Critical Business Services (e.g., CBS-2, CBS-3, etc.) are representative examples of the types of enterprise services that would typically support a central bank's payment and settlement operations. They should be aligned with BDCB's final enterprise Critical Business Service catalogue during implementation.

The completed mapping of interconnections and interdependencies provides BDCB with a comprehensive end-to-end view of how CBS-1 Payment & Settlement Systems is delivered across business processes, technology, operational teams, facilities, information assets, and external stakeholders.

Rather than viewing payment processing as a collection of isolated activities, the mapping demonstrates the operational relationships and dependencies that collectively sustain the continuous operation of Brunei's national payment infrastructure.

The analysis also highlights critical concentration points, including the Payment Processing Platform, RTGS Settlement Engine, and Business Continuity and Service Recovery capabilities, where disruption could have cascading effects across multiple Sub-CBS processes.

Critical hand-offs between payment operations, risk monitoring, incident management, and recovery functions are similarly identified, enabling BDCB to strengthen governance, establish redundancy where appropriate, and reduce the likelihood of single points of failure.

This dependency mapping provides a practical foundation for establishing and validating impact tolerances by identifying which upstream and downstream dependencies must remain available to maintain service within acceptable disruption thresholds.

It also supports the development of severe-but-plausible scenarios—such as payment platform outages, cyber incidents, telecommunications failures, liquidity disruptions, or data centre failures—and enables scenario testing to evaluate the resilience of the complete service chain.

Finally, the mapping should be regarded as a living Operational Resilience artefact. It should be reviewed and updated whenever business processes, technology platforms, facilities, third-party arrangements, regulatory obligations, or the operating environment change.

Maintaining an accurate dependency map enables BDCB to make informed investment, remediation, and risk management decisions while providing regulators with clear evidence of a mature and continuously evolving Operational Resilience capability.

eBook 3: Starting Your OR Implementation
CBS-1 Payment and Settlement Systems
CBS-1 DP	CBS-1 MII	CBS-1 ITo	CBS-1 SbPS	CBS-1 ST

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