The Client
One of Australia’s four major banking groups, this institution manages a vast and interconnected data ecosystem spanning consumer banking, institutional markets, and shared services. At this scale, Interface Agreements – the contracts that govern data exchange rules between producers and consumers – number in the thousands and underpin every critical cross-team data flow across the organization.
The Challenge
The bank’s manual approach to managing Interface Agreements had created compounding governance risks and significant infrastructure inefficiencies:
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Spreadsheet Dependency:
Managing over 1,000 Interface Agreements through manual spreadsheets led to version control failures, ownership ambiguities, and the accumulation of “Ghost Data” – datasets without active owners.
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Unchecked Cost Escalation:
Without a clear map of data producers and consumers, redundant datasets proliferated unchecked, contributing to millions in unnecessary storage expenditure.
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Compliance Exposure:
The inability to reliably consolidate and retain interface logs created material risks for regulatory audits and data provenance requirements.
The Impact
- 30% Potential reduction in storage costs via redundancy identification.
- 1,000+ Interface Agreements digitized and governed in a unified framework.
- E2E Traceability satisfying full regulatory audit requirements.
The Solution
Hoonartek implemented the methodology now embedded in the DataTrail FinOps Module, replacing the bank’s manual processes with automated engineering visibility. Legacy manual interface documents were converted into a standardized, upload-ready metadata model through an Automated Interface Metadata Hub, eliminating the version control issues inherent in spreadsheet-based governance.
Business stakeholders were automatically linked to their respective technical data assets through an Ownership and Stakeholder Mapping framework integrated into the central Metadata Hub. Semantic discovery logic was deployed to identify duplicate datasets and circular lineage patterns that had been silently inflating the bank’s storage footprint. The result was a governance portal that allows any team to modify or publish new data interfaces rapidly, without manual coordination.
Key Benefits
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Infrastructure Cost Reduction:
Identification of redundant data and cold storage candidates directly enabled meaningful reductions in platform storage spend.
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Ghost Data Elimination:
Ownership mapping and automated governance removed datasets without active owners, optimizing platform footprint and query performance.
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Audit Readiness:
End-to-end traceability of all data exchange rules provides the evidentiary trail required for regulatory compliance.
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Digitized Workflows:
Over 1,000 Interface Agreements are now governed through an automated, metadata-driven portal rather than error-prone manual tracking.
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Rapid Interface Onboarding:
The GUI-based portal dramatically reduced the time required to publish or modify data interface agreements.