Data Analytics Driven Automation
Forward Congruency:
Modernising Legacy Systems for SAP S4 HANA Migration
SAP S4 HANA Migration
A Use Case on Legacy System Modernisation for Banking
As banks and financial institutions race to update their technology stacks, the shift from decades-old systems to cloud platforms presents formidable hurdles. This case study showcases how Calimere Point guided the world's largest building society through this technical maze with precision and expertise.
In this case study, we examine the implications of SAP's 2027 deadline approaching for legacy system support, as financial institutions globally face similar challenges.
"With the 2027 SAP deadline approaching, organisations must either migrate their critical business logic or face significant operational risk."
Use Case Summary
Challenge
Forward Congruency: Modernising Legacy Systems for SAP S4 HANA Migration
The world's largest building society faced a critical challenge during their SAP S4 HANA migration: translating complex client deduplication logic from legacy COBOL code to modern PySpark within Databricks. This forward congruency process - essential for maintaining clean customer records - exact replication with zero functional degradation.
Solution
Calimere Point delivered a comprehensive transformation solution:
Deep Legacy Analysis
Meticulously decoded complex COBOL business logic to map critical variable interdependencies and conditional flows, preserving decades of institutional knowledge.
Exhaustive Testing
Validated every possible input combination across both systems to ensure 100% functional equivalence, eliminating all risk of customer data corruption.
Knowledge Transfer
Documented all processes for future maintenance, enabling the client to independently maintain and evolve their critical systems going forward.
Perfect Translation
Rebuilt functionality in modern PySpark for Databricks to eliminate dependency on specialized COBOL expertise while achieving 15x performance improvement.
Collaborative Implementation
Worked seamlessly with internal data science teams to embed the solution while upskilling client teams in modern data engineering approaches.
Impact
Perfect functional equivalence with 15x performance improvement: The power of preserving business logic while embracing modern architecture.
This successful implementation maintained critical business continuity while enabling the broader SAP transformation journey. Our expertise bridged decades-old technology with modern data engineering, ensuring that millions of customer records remained accurately managed throughout the transition.
The clock is ticking: Transform your legacy systems by 2027 or risk operational paralysis
With SAP's 2027 deadline approaching for legacy system support, financial institutions globally face similar challenges. This project demonstrates our ability to preserve critical business logic while modernising enterprise technology stacks - a capability increasingly vital for organisations undertaking digital transformation initiatives.
Calimere Point is uniquely positioned to assist organisations in SAP Migration with zero business disruption.
This summary provides only a glimpse of how Calimere Point enabled this financial institution to overcome complex migration challenges while preserving critical business functionality.
Download the complete Use Case to discover detailed implementation strategies, technical approaches, and lessons learned that can be applied to your own digital transformation journey.
