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Client story


Client: Major telco organization
Region: Hungary
Sector: Telecommunications

Capgemini Hungary helped a major telecommunications player launch their business support systems (BSS) transformation program with data migration at the core.

We contributed as a technology and consultancy partner thanks to our proven end-to-end migration methodology and toolsets. We developed the migration strategy, planned the source-to-target mapping, specified the transformation and data quality rules, established the ETL framework, and operated the ETL processes for migration, testing and defect management.


The aim of the BSS transformation program was to evolve business processes, product model, and services to ensure a higher scale of flexibility in sales, distribution, and customer relationship management.

To support this initiative, our client decided to implement a new BSS stack for supporting simplified and enhanced business operations. The client wanted to involve a trusted vendor who could support their business and IT transformation initiatives by establishing a migration strategy between the legacy and the new BSS stack, while implementing and operating a migration framework with proven methodology, toolsets, and best practices.

Capgemini Hungary was selected to execute this complex engagement, based on our proven methodologies, telco domain BSS transformation and migration expertise, and extensive capabilities and toolsets.


After understanding the source and target architecture, business objectives, and data model, and identifying the source systems to be involved in the migration, we developed a migration strategy, elaborating the source-to-target mapping, and specifying the transformation rules.

We covered the following sub-streams of migration in the transformation program:  Planning, design, data cleansing, data migration solution implementation with the ETL toolset, migration operation and monitoring, migration testing, and defect management.

The project duration was 11 months, with an average of 35 full-time employees involved. We also provided additional professional support on a T&M basis in the following areas: project management, business analysis, KPI management, and test and defect management.


We accomplished a successful migration for the client. All their legacy business objects and related source data were transferred into the target stage with the expected level of quality and consistency, enabling the BSS application to perform a final load.

The migration strategy, methodology, best practices, and know-how were transferred to the client for upcoming BSS transformations with their other operators, and the migration tools developed and customized during the project can be reused with further customization in similar BSS transformation/migration projects.