SAP Brownfield Implementation
Move from SAP ECC to SAP S/4HANA and keep what already works: your configuration, your history and the processes your teams rely on. We clean up custom code, sort out interfaces and switch on Fiori, with a cutover planned around your business.
Convert ECC to S/4HANA without starting over
If your SAP ECC system still supports the business well, you do not have to rebuild it to reach S/4HANA. A Brownfield conversion takes your existing system across, with the changes S/4HANA requires, and keeps your historical data and investments intact.
We work mainly with small and mid-sized SAP customers, where keeping disruption and cost under control matters as much as the new capabilities.
Why move from ECC now
SAP mainstream maintenance for SAP ECC 6.0 ends at the end of 2027. Optional extended maintenance is available until the end of 2030, at extra cost.
Staying on ECC means rising support costs, growing security exposure and no access to new SAP capabilities such as embedded analytics, AI and SAP Joule. Regulated companies also have to keep meeting requirements such as GDPR and FDA 21 CFR Part 11 on an ageing platform.
S/4HANA runs on the SAP HANA in-memory database, uses a simpler data model with one Universal Journal for finance, and comes with the Fiori user interface.
When Brownfield is the right choice
- Your ECC processes still fit the business
- You want to keep your historical data in the system
- You need to reach S/4HANA quickly, or with a limited budget
- You want as little disruption to daily operations as possible
We start by analysing your system with SAP’s Simplification List and the Custom Code Migration app. That shows exactly what has to change before the conversion, so there are no surprises later.
Two ways to do a Brownfield conversion
- System conversion: the standard route. Your ECC system is converted in place to S/4HANA, with all configuration, history and (adjusted) custom code.
- Selective data transition: a new S/4HANA system built as a copy of your existing setup, into which you move only selected data, for example open items, master data or certain company codes. Useful for cleaning up data, merging several ECC systems or redesigning some processes.
We help you weigh both routes against your goals, risk appetite and timeline.
Industry experience
- Manufacturing: moving PP-PI/DS and shop-floor control to S/4HANA with better production visibility.
- Life sciences and pharma: keeping GxP compliance, FDA 21 CFR Part 11 and data integrity intact for batch and QM processes.
- Retail and consumer goods: modernizing SD and MM for faster inventory turns and omnichannel selling.
- Supply chain: adding SAP IBP for planning and modernizing EWM, without interrupting operations.
What improves after the conversion
- Finance: the Universal Journal gives real-time figures and a faster close.
- Supply chain: planning with SAP IBP, warehousing with SAP EWM and procurement with SAP Ariba.
- Manufacturing: recipe management, batch traceability and shop-floor data capture through Fiori or SAP Digital Manufacturing.
- Sales: cleaner customer data, flexible pricing and quicker order fulfilment.
- Asset management: integrated work orders and predictive maintenance.
Return on investment and running costs
Because you reuse what works, a Brownfield conversion usually delivers value sooner than a full re-implementation. The effort goes into the technical move, custom code and selected improvements, not a rebuild.
Running costs come down as well: unused custom code is retired, old data is archived and the simpler S/4HANA data model is easier to maintain. If you combine the conversion with RISE with SAP, infrastructure and maintenance move to SAP and become a predictable monthly cost.
How we run a conversion
- Technical move: SAP Software Update Manager with the Database Migration Option, or near-zero-downtime options where the business cannot stop.
- Custom code: analysed and adapted with the Custom Code Migration app and ABAP Test Cockpit, and retired where it is no longer used.
- Security and compliance: roles reviewed and tightened, and the system set up for audits from day one.
- Smaller data footprint: archiving and clean-up before conversion for better performance.
- Fiori: the relevant apps switched on, so users see the benefit without a full process redesign.
- Interfaces: reviewed and, where it helps, moved to SAP BTP and APIs.
- Testing: automated tests through every test conversion, including validation for regulated industries.
Often combined with a conversion
SAP Greenfield
Want to redesign your processes? Start fresh on S/4HANA instead.
Learn more →SAP Cloud ERP (RISE)
Convert and move to the cloud in one program.
Learn more →SAP BTP
Move custom code out of the core into BTP extensions.
Learn more →AMS & Managed Services
Hypercare and ongoing support after the conversion.
Learn more →How a system conversion works
- 1Readiness checkFind what has to change before conversion.
- 2Custom code analysisDecide what to keep, fix or retire.
- 3Simplification itemsPrepare finance, master data and business partners.
- 4ConversionConvert a copy first, then repeat until clean.
- 5Test cyclesRegression and user tests on the converted system.
- 6Go-liveFinal conversion over a planned weekend.
Why ITRadiant for an ECC conversion
A good conversion is mostly preparation: knowing your custom code, your data and your interfaces before the technical move.
- Readiness check before we quote: custom code, simplification items and data volumes are analysed first, so the plan holds.
- Low-disruption cutover: DMO and near-zero-downtime options keep the business running.
- Compliance kept intact: GxP and FDA 21 CFR Part 11 are part of the plan for regulated clients.
- Clean-up as we go: we retire unused custom code instead of converting it.
Frequently asked questions
What is an SAP Brownfield implementation?
Converting your existing SAP ECC system to SAP S/4HANA. Your configuration, custom code (after any necessary changes) and historical data come with you.
What are the main challenges?
Adapting custom code to S/4HANA, cleaning up old data, and planning the cutover so the business keeps running. All three are manageable with a proper readiness check at the start.
What are the benefits of a Brownfield conversion?
It is usually faster and less disruptive than starting over, keeps your history and reuses the processes that already work.
How is data handled in a Brownfield conversion?
In a system conversion, data is converted in place during the technical move, after clean-up and, where useful, archiving. In a selective data transition, you choose exactly which data moves.
What are the steps in a Brownfield project?
Readiness check, planning, custom code and data preparation, several test conversions, user testing, cutover, and hypercare after go-live.
When should we choose Brownfield over Greenfield?
When your SAP processes still fit the business, you want to keep historical data, and you need to reach S/4HANA quickly or on a limited budget. If you want to redesign your processes, Greenfield may suit you better.
How does ITRadiant make a Brownfield conversion succeed?
We follow CMMI Level 3 processes, start with a readiness check, run several test conversions before the real one, test thoroughly, train users, and support you through our AMS team after go-live.
Still running SAP ECC?
Start with a readiness check. We analyse your custom code, data and interfaces and give you a realistic conversion plan.
