For years, SAP has been running the show for loads of businesses. Good old reliable SAP - until it isn't so reliable anymore. The customisations pile up, processes get complicated and real-time insight becomes mission impossible.
That's why getting onto S/4HANA is such a priority. It's not just about throwing a new tech platform at the problem. It's about stripping back complexity, giving your system a boost and getting you ready for whatever comes next. If you're weighing up an SAP conversion to S/4HANA, then the end-game is simple: Get your core system in order, simplify it, and create a solid platform for the future.
Let's get to the nitty-gritty.
An SAP conversion to S/4HANA (or system conversion/brownfield migration) is the process of migrating your existing SAP system from ECC to S/4HANA.
Not as straightforward as a full reboot, conversion:
Keeps your existing data on board
Keeps the core structures in place
Converts the system to run on SAP HANA
So, you get to:
Hold onto your previous investments
Get on to a modern platform
Keep disruption to a minimum
It's a step forward, not a total restart. Getting the technical requirements right is crucial to a smooth conversion.
Time to understand the difference.
Brownfield conversion is when you take your existing SAP ECC system and convert it into S/4HANA.
This is often the route lots of businesses take because they want to:
Keep existing configs in place
Keep historical data safe
Avoid building things from the ground up
Move faster with less disruption than a greenfield
Brownfield is most suitable for companies with an ECC environment that's pretty much in one piece, and doesn't need a total redesign.
Greenfield means starting from scratch. You implement S/4HANA as a brand new system and redesign processes from the ground up.
This is often the best bet if:
Your current system is heavily customised or ancient
You want to simplify things
You see the project as a chance to shake things up and transform the business
Hybrid migration is a mix of the two and can be a practical migration path.
The Hybrid option is when you mix in some bits of both approaches and can be a good middle ground.
Takes your existing SAP ECC system and converts it
Keeps historical data safe
Much faster and less disruption
Builds a brand new S/4HANA system from scratch
Completely redesigns processes
Requires more time and change
Most businesses choose conversion if:
Their systems are stable
Their processes still hold up
They really need to keep the data
The choice between conversion and greenfield implementation is all about your current setup.
There are loads of drivers behind SAP conversion to S/4HANA - and one of the main ones is ECC support timelines: mainstream maintenance for older SAP ECC versions is ending in 2027 and delaying beyond that can throw up compliance headaches.
SAP ECC support timelines mean you need to move on.
Old legacy environments are notorious for:
Loads of customisations
Workarounds
Fragmented processes
Performance limitations
Traditional systems:
Rely on batch processing
Struggle to keep up with growing data volumes
Need real-time insight
S/4HANA lets you:
Get instant reports
Do embedded analytics
Make decisions faster
Be more agile in business
Use an in-memory database to give you a performance boost while reducing the data footprint
The universal journal also reduces data footprint by simplifying the way things are structured.
Modern businesses need systems that:
Can adapt quickly
Integrate easily
Support innovation
Conversion is usually the first step.
Even in a conversion approach, S/4HANA brings some pretty significant changes.
A simplified data model means you no longer have to deal with all the unnecessary duplication of data.
S/4HANA also introduces real-time material requirement planning capabilities.
Some process steps will change as traditionally used transactions are replaced, merged or redesigned.
SAP Fiori is the modern interface for S/4HANA and lets users access real-time data, so they get a more role-based and streamlined experience.
Access methods, navigation and screen layouts are likely to be different from ECC, especially for those moving to browser-based apps.
Training is usually necessary to get teams up to speed on the new workflows and screens.
Less data duplication
Faster processing
Easier reporting
Real Time Processing
Transactions update right away
Transactions start updating the moment they happen
Reports show what's happening in real time
The reporting part of your processes is built right in
That means you don't need to use a separate system for reporting
We've implemented the SAP Fiori interface
Navigation is a lot more intuitive
These changes help out with both how well your system performs, and how easy it is for you to use.
SAP conversion to S/4HANA involves following a structured process to convert your system. Before you even start planning the move, it's a good idea to assess your current system landscape. You also need to plan carefully for the cutover and post-go-live support if you want the migration to be a success.
Take a close look at your current ECC system and see how it's working for you
Identify where you have customisations and complexity
Check to see if your system is really ready for conversion
You need to clean up your data, and make sure everything is legit
Get rid of any inconsistencies
Use data volume management to reduce your data footprint
Cleanse and archive your data before migration
Go through your records, to make sure everything is correct
Automate where you can, but be prepared to put in some manual effort
And don't forget to prepare for migration, because poor data quality can really make the transition to SAP S/4HANA a lot harder - over 70% of companies end up with data integrity issues during migration
Convert your database over to the SAP HANA database
Use the software update manager to help guide you through the technical conversion and data migration
Upgrade your system to S/4HANA
Get all the core conversion activities wrapped up
Double check that all your processes and integrations are working properly
Make sure your system is still running smoothly
Time to switch over to S/4HANA
Keep an eye on how the system is behaving
Find ways to improve your processes
Simplify your system design
Make sure you have all the new capabilities you need
Conversion is more than just a technical process, it needs business alignment at every step of the way.
When you do it properly, the results are clear.
Faster processing and reporting
Transactions are moving at a quicker pace
Keeps all your existing data and processes
No need to start from scratch
Less disruption than a full reimplementation
Your business can keep on running without too many hiccups
Modern capabilities - analytics, automation and integration
Get access to the latest tools and tech
A solid foundation for future change
Get ready to move to the cloud and take advantage of new technologies
It's a steppingstone to transformation
Even though the benefits are clear, organisations still face challenges like:
Data issues - inconsistent or outdated data
Customisation complexity - legacy modifications and custom code that causes problems with conversion
Integration dependencies - your connections with other systems that need adjusting
User readiness - teams not adapting to new interfaces and processes
Migration risk - adoption of new systems can be a challenge, and if the users aren't on board, you might get downtime during the move
You need careful planning, experience and change management to overcome these challenges.
A lot of organisations reach a point where conversion is needed because:
Systems have been around for a while and need an overhaul
Processes no longer align with business needs
They’ve outgrown the old system
Data becomes inconsistent over time
Complexity increases, and it gets harder to manage
If you don't do anything about it:
Performance starts to decline
Costs start to increase
Change becomes a lot harder to implement
Conversion is often driven by this accumulation of complexity over time.
Application Management Services (AMS) are critical to your success, both before and after conversion.
They help with:
System stability - keeping the system up and running
Issue resolution - fixing problems as soon as they come up
Data consistency - making sure everything is accurate and consistent
Ongoing optimisation - always looking for ways to improve the system
AMS helps:
Conversion runs smoothly - no major hiccups during the transition
Systems stay aligned - your business is still running smoothly post migration
Improvements keep coming - you keep on getting better over time
Without support, it's a lot harder to see the value in conversion.
SAP consultancy plays a big role in helping organisations convert.
They help you:
Assess readiness through data analysis and conversion preparation
Get a clear picture of what lies ahead
Define the conversion strategy and choose the right migration path based on what your goals are
Simplify your systems before conversion
Get rid of anything you don’t need
Reduce unnecessary complexity
Make the conversion process a lot easier
Include custom code analysis and adaptation as part of the preparation so you can make sure it works with S/4HANA
Follow a clean core approach to minimise modifications in SAP S/4HANA so you can make future upgrades a lot easier
This helps with:
Lower risk - you're less likely to hit any major roadblocks
Faster conversion - you can complete the conversion a lot faster
Better long-term outcomes - your system will be easier to maintain and upgrade in the future
It's not just about moving to a new system, it's about improving it.
In today's SAP landscapes you're likely to see:
S/4HANA as the core ERP - your main system for managing business processes
Cloud platforms for integration - your data is spread across multiple places
Analytics for real-time insight - get instant access to what's going on in your business
Connected applications across the business - your apps and systems are all talking to each other
This also means you have lots of flexibility in terms of deployment options.
S/4HANA can be on-premise or in the cloud, depending on what's best for your business.
Modern environments also bring in new capabilities like central finance for example, you can have material numbers that are 40 characters long and customer rebates are replaced by Condition Contracts in S/4HANA.
Conversion is often the first step towards:
Cloud adoption
Process optimisation
System modernisation
And that sets you up for a lot of other good things to come.
When it all works out well:
Systems are converted without a hitch - no major disruptions
Data is clean and consistent - no more messy data to deal with
Processes remain aligned - everything is still working as it should
Performance improves immediately - your system is running faster and stronger
The business is ready for further transformation - you've got a solid foundation to start your next stage of growth
Conversion is a steppingstone to progress, not just an upgrade.
SAP conversion to S/4HANA - upgrading your existing SAP system to the latest version
SAP ECC - the SAP system of old - even if it was only a few years ago it's now a legacy ERP system.
S/4 HANA - the shiny new SAP ERP platform built on HANA. A game changer.
Brownfield approach: We're talking taking your existing system and keeping pretty much everything, including data and processes. Nice and efficient.
Greenfield approach: On the other hand you can choose to build from the ground up - a completely new system from scratch, no worrying about keeping old stuff.
AMS (Application Management Services): We keep things running smoothly for SAP systems on a day-to-day basis
What's SAP conversion to S/4HANA all about?
In short, it's what happens when you upgrade your old SAP system to the new S/4HANA system. Not to be confused with a brand-new implementation.
Is conversion the same as implementation?
No way, that's like apples and oranges. Conversion leaves the existing system intact, whereas an implementation is a complete overhaul. Some firms actually go for a mix of both - essentially, they upgrade but also make targeted changes which is a bit of a hybrid, but it’s a good way to go.
How much time does SAP conversion take to go through?
Let’s just say it depends on the size of the beast you're trying to tackle - system complexity and scope play a huge role here.
What are the real advantages of SAP conversion?
The main benefits are a big improvement in system performance and real-time data, plus all the modern features that have come with the new system.
Is conversion the end of the journey?
Hardly - it's a first step and then you'll likely need to optimise things a bit further.
Now SAP conversion to S/4HANA isn’t about starting from scratch it’s about moving on. You can end up with a much simpler system that works faster and gives you a better view of your business - and that's just the beginning. That's where we can help.