A HANA migration project is often seen as a must-do. There are deadlines looming, promises of better performance and a push to modernise. But being inevitable doesn't make the job easy.
For lots of businesses, moving to SAP HANA is a daunting task. Years and years of data, custom code and critical processes that can't afford to be disrupted. The fear isnt the technology itself, but what might break along the way.
If you're planning a HANA migration project or just looking for some clear HANA migration steps, the real goal is simple: move forward without taking all those problems of the past with you into your new system.
So let's break it down in simple terms.
At the most basic level, a HANA migration project is about moving from an old SAP database over to SAP HANA's in-memory platform. But in reality it's a lot more complicated, and many initiatives get wrapped up in a broader SAP S/4HANA migration - mainly because that was introduced in 2015 as a brand new ERP system to replace the old one.
A HANA migration touches on:
Data volumes and how it's all laid out
Custom code written by people
Core business processes that aren't going to change
Reporting and analytics that need to get faster
Places where systems integrate
The way people actually do their jobs day to day
That's why thinking of a HANA migration as just a technical upgrade just never seems to work out as planned. The system might get moved over alright, but the problems still linger.
Most people dont start a HANA migration project for just one single reason.
Common drivers include:
SAPs support deadlines - ECC is ending in 2027 and if you don't move you'll miss out on security updates
Wanting a faster and snappier system
Needing reports and analytics to be in real-time
Needing a simpler data model
Getting ready for S/4HANA
By now, only 29% of SAP customers have moved to S/4HANA, which is why so many organisations are now making their decisions a lot quicker.
Underneath all that, there's a bigger reason why organisations are making the change. They want SAP to feel easier to use, faster and more reliable. HANA can give that to you - but you need to do it the right way.
HANA migration projects don't usually fail completely - they just struggle along.
Common risks include:
Taking all the old problems and complexity into the new system
Underestimating what a pain data cleaning is going to be
Keeping old, unused or even obsolete custom code that won't work in the new system
Not getting your business people enough involved
Thinking go-live is the end, rather than just the start
Doing a fit-gap analysis can help you spot any inconsistencies between the old ECC setup and S/4HANA before they cause problems later on.
When these risks do happen, organisations end up with a new system that is faster but still feels clunky and difficult to get the best out of.
That's why the steps matter.
Every place is different, but all the successful HANA migration projects tend to follow the same principles - they start with a real plan and also stick to the SAP Activate Framework. The core HANA migration steps are:
A proper data migration project usually involves seven phases that you repeat a few times. Even if you do adapt them to your own set-up.
Before you do any actual technical work, define what the end result should be.
Ask:
What should be easier for people after the HANA migration?
What problems are we trying to sort out?
What should be different for users?
Having a clear idea of what you want to get out of it guides every decision you make afterwards. Without it, you'll just be rushing to migrate and hoping for the best.
A successful HANA migration project starts with a real look at what you've got today.
That includes:
The quality of the data and how much of it there is
Whether you've got loads of custom code
Where and how you integrate things
Any workarounds or patches that are holding things together
Early on, you need to do some analysis on your data to find out what you can carry over and what you shouldn't.
This isn't about pointing the finger at who messed it up - it's about deciding what deserves a place in your new system and what doesn't belong.
HANA is a powerful tool - but its also unforgiving. Poor data, old legacy data and out-of-date design choices all become a lot more visible on HANA, rather than less.
One of the most important things to do is:
Get rid of obsolete data
Archive any data that's no longer useful
Get rid of any custom code that isn't needed anymore
Simplify any processes that aren't working efficiently anymore
Getting your data in order before the move really does save you a lot of pain and hassle later on. In a brown-field migration, the existing ECC system is bumped up to SAP S/4HANA without being overhauled from the ground up. Which can be a tougher slog if you've got custom code to adapt, and some teams are opting for a hybrid approach that blends the best bits of green-field and brown-field thinking.
A successful HANA migration project asks the right questions:
Do we really need this anymore?
Has SAP got all this under control now?
What's the cost benefit of sticking with it?
Cutting back on custom code makes the system run smoother, makes testing a whole lot easier and means ongoing support is a doddle.
HANA's not just a swifter database - it revolutionises the way you work. Real-time data access, simplified aggregates, faster reporting... you get the picture.
For a HANA migration to work, you need to:
Give those reports and analytics a good going over
Ditch any unnecessary batch processing
Have a good hard think about how you access and use data - including mapping the old to the new
The mapping phase is where you make sure the data structures line up right before you shift it all across to the new system.
That's where HANA starts to feel like an actual upgrade.
HANA migration impacts users, even if the screens look familiar. Performance changes, reporting behaves differently, data's available faster.
When the business is brought in early:
You get to challenge some assumptions
Testing becomes way more meaningful
Adoption's way higher because everyone knows what's expected of them
When they get dragged in late, nasty surprises tend to hit at the worst possible time. A HANA migration project works its best magic when IT and the business work together in perfect harmony, especially when your IT and business teams are singing from the same hymn sheet.
Testing's not about proving the system works, it's about proving that the business can actually run - which means you should test that data migration process multiple times before you even think about going live.
Proper HANA migration testing covers:
End-to-end processes from start to finish
Peak volumes - the high-water mark for a system
Critical reports - the ones that really matter
Financial reconciliation - just to keep the bean counters happy
And integration behaviour - how it all hangs together
Simulations help you spot potential problems before you do the final swap. Validation in the target system confirms that the data's high-quality before you transfer it.
If you only focus on the tech side of things, you'll just be storing up problems for later on.
Go-live's just a milestone - it's not the finishing line.
After the HANA migration:
Performance tweaks continue
Users need reassurance
Processes settle into new rhythms
New opportunities start to emerge
Without a plan for ongoing support, the initial momentum will quickly fizzle out.
HANA migration brings you a new platform, but AMS keeps its value.
Application Management Services (AMS) helps:
Get the system stabilised post go-live
Keep an eye on and fine-tune performance
Support users as they get used to the new system
Keep data quality up to snuff
Stop workarounds creeping back in by the back door
Without ongoing support, the best HANA migration projects will slowly start to slide back into old habits.
HANA migration tools are one thing, but experience counts for way more.
SAP consultancy helps:
Shape the right migration strategy
Review data sources and pick the right migration objects
Turn business goals into actionable tech decisions
Keep things simple and avoid unnecessary complexity
Keep the project focused on what really matters - outcomes
The migration cockpit also makes it easier to shift data from different sources into SAP S/4HANA and cloud deployments.
The goal isn't just to migrate to HANA - it's to end up in a better place.
When a HANA migration project is done right:
The system feels faster and leaner
Reports are trustworthy
Data's easier to access
Users notice the difference, not the disruption
SAP feels lighter, not heavier on their shoulders
HANA becomes an enabler, not just a box that's been ticked.
HANA migration project
A project that moves an existing SAP system from a legacy system to the SAP HANA database - including data migration and the like.
SAP HANA
SAP's super-fast in-memory database platform designed for speed and real-time analytics which only runs on Linux.
Master data
Core reference data used across business processes like products, customers and suppliers.
Transactional data
Day-to-day operational records that need different migration handling from master data.
Custom code
The custom stuff that customers build on top of standard SAP functionality.
Data archiving
The process of removing historical data from active tables while still keeping access if needed.
AMS (Application Management Services)
Ongoing support and improvement for SAP systems after the initial implementation or migration.
Do you HAVE to do a HANA migration? Support timelines can make it pretty much impossible to avoid in many SAP environments.
Is HANA migration just a technical exercise? Nope. Business process, data migration, user experience and all the other bits that come with digital transformation are just as crucial.
Can we just wing it and not change anything? Well you can try, but be prepared to miss out on a lot of what HANA has to offer.
How long does a HANA migration take then? That depends on what you're doing, how much legacy data you're dealing with, and how slick your team is at moving data over to the new environment.
Do we really need AMS after all? Yep, because all the real value is created after you're live, not just during the initial migration.
A HANA migration project shouldn't have to be a scary or chaotic experience; get your goals straight, do some proper cleanup work, break it down into manageable steps, and have some solid ongoing support in place - and suddenly it becomes a chance to transform your SAP operations and make them simpler, faster and way more reliable.
Get the system moving. Make the experience better. Lock in the results. That's the idea behind HANA migration and how it delivers real benefits on top of SAP S/4HANA. Of course, getting the data right in the first place is just the start - you need to keep reviewing, optimising and supporting it after it's all been transferred. That's where we can help out a bit. If you want the gory details, go take a look at the relevant SAP Note or a good blog post.