Tata Consultancy Services > Case Studies > Revamping EE's Legacy ERP: A Case Study on BT's Strategic Transformation

Revamping EE's Legacy ERP: A Case Study on BT's Strategic Transformation

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 Revamping EE's Legacy ERP: A Case Study on BT's Strategic Transformation - IoT ONE Case Study
Technology Category
  • Application Infrastructure & Middleware - Event-Driven Application
  • Functional Applications - Enterprise Resource Planning Systems (ERP)
Applicable Industries
  • Cement
  • Construction & Infrastructure
Applicable Functions
  • Product Research & Development
Use Cases
  • Construction Management
  • Infrastructure Inspection
Services
  • Cloud Planning, Design & Implementation Services
The Challenge
EE, even after its merger with BT, was operating its ERP estate on legacy infrastructure, hosted on the premises of a third-party supplier. This outdated system resulted in a volume-based operational model, higher time to market, longer delivery cycles, and unsatisfactory customer experience. BT recognized the need for a strategic transformation of these aging ERP systems and sought a partner who could proactively manage application services. The partner was also expected to handle development requirements associated with application management services, drive accountability, and ownership with a time and target-driven transformation of these services. BT's primary goals were to improve customer experience, reduce cycle time, and measure these improvements with precision.
The Customer
About The Customer
EE, a British mobile network operator and internet service provider, was operating its ERP estate on legacy infrastructure. Even after its merger with BT, a multinational telecommunications holding company, the ERP systems remained outdated and inefficient. BT recognized the need for a strategic transformation of these systems to improve customer experience, reduce cycle time, and measure these improvements with precision. They sought a partner who could proactively manage application services and handle the development requirements associated with these services.
The Solution
TCS was chosen as the partner to help BT achieve its goals. They migrated EE's SAP ERP to SAP HANA infrastructure on the cloud. An advanced command center was set up for near-real-time handling of issues and customer triage. The team built reusable assets and enabled predictive spend analysis. They adopted a Kanban approach to monitor operations, which significantly reduced the number of defects and defect leakages, thereby improving BT’s customer experience. The team proactively resolved issues, overcame age-old design limitations, and continuously monitored the process chain to reduce the time to market. TCS played a pivotal role in migrating EE’s legacy SAP ERP to SAP enterprise infrastructure on the cloud.
Operational Impact
  • The migration of EE's SAP ERP to SAP HANA infrastructure on the cloud marked a significant step in BT's ERP transformation journey. The establishment of an advanced command center enabled near-real-time handling of issues and customer triage. The adoption of a Kanban approach to monitor operations led to a substantial reduction in the number of defects and defect leakages. This proactive approach to issue resolution and continuous monitoring of the process chain significantly improved BT’s customer experience and reduced the time to market. The transformation also overcame age-old design limitations, marking a crucial milestone in BT's ERP transformation journey.
Quantitative Benefit
  • £3.2 million saved in three years
  • 40% Savings in SAP infrastructure cost
  • 60% Savings in service desk support cost

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