Successful Brownfield Conversion from ECC to S/4HANA on RISE

Aevitas IT completed an seven-month Brownfield conversion for a full-service National Utility, moving SAP ECC 6.0 EHP 0 to SAP S/4HANA Cloud Private Edition through RISE with SAP. The program included complex Utilities CVI and critical billing processes.

Platform | SAP S/4HANA Cloud Private Edition

Method | Brownfield System Conversion with SAP Cloud ALM Governance

MONTHS TO DELIVER

0 %

FASTER DEPLOYMENT

< 0 hrs

FROM CUTOVER TO BILLING CYCLES RUNNING

OBJECTIVES

The utility needed to move its mission-critical ECC landscape to SAP S/4HANA on RISE with SAP without disrupting billing, customer service, or financial close. The project also needed to carry every integration, report, and user across to the new platform.

Convert SAP ECC 6.0 to S/4HANA through a Brownfield conversion
Migrate from a local data center to SAP S/4HANA Cloud Private Edition on RISE with SAP
Protect billing and core operations through cutover
Remediate custom code and technical objects for S/4HANA compatibility
Prepare complex Utilities CVI for the S/4HANA Business Partner model
Enable organization to adopt AI and LLM capabilities to improve efficiencies
Deliver a controlled program in seven months

Execution highlights

Aevitas IT ran a structured conversion designed to minimize risk while keeping utility operations running.

Brownfield conversion: SAP ECC 6.0 converted in place to S/4HANA Cloud Private Edition, moving from a local data center to RISE with SAP
Utilities CVI transformation: Legacy customer/vendor structures successfully transitioned to the S/4HANA Business Partner model, preserving critical utility customer, billing and financial relationships
SUM/DMO and remediation: Conversion executed with SUM/DMO, with custom code, interfaces, and background jobs remediated and validated
Mock cycles and downtime optimization: Early conversion cycles identified technical challenges and downtime constraints. Repeated mock cycles refined the conversion with customer billing restarted within 24 hours
SAP collaboration: Aevitas Basis and technical experts worked closely with SAP, patiently evaluating optimization options to shorten the cutover window
End-to-end validation: System integration testing, end-to-end integration testing, and business UAT across billing, finance, supply chain, and all interfaces, tracked in SAP Cloud ALM
Controlled go-live and hypercare: Go/no-go checkpoints, business-owner sign-off, contingency planning, user and administrator training, and hypercare support

delivery timeline

Seven months from kickoff to go-live, with each phase building readiness for cutover.

MONTH 1 - PREPARE

Kickoff, landscape readiness, Cloud ALM and governance.

MONTH 2 - EXPLORE

Readiness Check, process assessment and conversion strategy.

MONTH 3 - DESIGN & ALIGN

Finalize CVI, testing, integration and cutover plans.

MONTH 4 - CONVERT

Execute the first Brownfield mock conversion and remediate technical findings.

MONTH 5 - VALIDATE

Run additional mock cycles, optimize downtime, complete SIT and begin UAT.

MONTH 6 - TEST & READINESS

Complete end-to-end testing, business validation, final rehearsal and go/no-go preparation.

MONTH 7 -
GO-LIVE

Execute production cutover, validate operations and begin hypercare.

business results

Complex CVI Delivered

Legacy customer and vendor structures successfully transitioned to the S/4HANA Business Partner model.

AI Enabled

AI enabled organization to leverage SAP

Revenue Protected

Billing cycles live within 24 hours of cutover, protecting revenue and customer statements

Improved Reporting

Improved reporting through embedded analytics, CDS-based views, and self-service access.

Faster Customer Service

Service reps see contracts, billing, and open items in one Fiori view for faster, first-call resolution.

Stronger User Adoption

Faster dunning runs on HANA with real-time open items and less manual follow-up on overdue accounts.

Go-Live on Schedule

Production go-live landed on the planned date, with go/no-go gates and a rollback plan in place

Clean Technical Landing

Custom code, background jobs, and security roles remediated and validated for S/4HANA compatibility.

Integrations Reconnected

Bank, meter-reading, portal, and third-party interfaces assessed, remediated, and reactivated.

Aevitas kept the conversion disciplined from the first workshop through cutover. Our billing, finance, and operations teams went into go-live knowing what had been tested, who owned what, and how we would recover if we needed to.

- Executive Sponsor

why aevitas?

Aevitas brought conversion discipline, utility process knowledge, and tight coordination with SAP’s RISE teams to a program where billing, finance, and customer service could not afford surprises.

Deep SAP ECC to S/4HANA Brownfield conversion experience, including SUM/DMO and remediation.
Utilities expertise across IS-U billing, CVI, and customer-facing processes.
Basis and technical specialists who work closely with SAP's RISE teams to optimize conversion and cutover.
Strong integration experience across banking, meter reading, middleware, and file-based interfaces.
Disciplined cutover governance: mock rehearsals, go/no-go gates, and business-owner sign-off.
Transparent delivery governance in SAP Cloud ALM, through hypercare.

Ready to Move from ECC to S/4HANA on RISE?

Contact Aevitas IT to plan a practical ECC to SAP S/4HANA conversion on RISE with SAP that protects your operations, reconnects your critical systems, and provides an AI enabled platform to accelerate efficiencies.