A complex legacy technology estate was holding back the ability of a national government’s department of finance to modernise and migrate.
A division of a national government’s department of finance, responsible for managing the nation’s debt, offering lending guarantees, and selling gilts, wanted to modernise its complex and disparate legacy estate by migrating to new technology.
Understanding the estate was problematic, and change was expensive with a potentially high risk of data error. It was therefore hard for the finance department to devise either a migration path or a future data model to better serve the user base of researchers and civil servants.
Before embarking on a programme of change, the department decided to run a discovery process to document the legacy estate. Along with a definition of the existing and future estate – to include current data volumes and expected growth – documentation of all integration points between systems was required, along with data flow diagrams for all entities involved. The scope of work included analysis of the existing data model and identification of the key attributes and relationships in a high-level logical data model.
