Key Points
- RISE with SAP migration success depends on making the right historical data decisions, not just moving to SAP S/4HANA.
- Migrating only active business data reduces SAP HANA costs, shortens project timelines, and simplifies implementation.
- Historical SAP ECC data must remain accessible to meet long-term compliance, audit, and regulatory requirements after migration.
- Years of SAP customizations, integrations, and technical debt significantly increase migration complexity and testing effort.
- A selective migration strategy combined with historical data archiving enables faster cutovers and complete legacy system retirement.
- Archon ArchiveLink complements RISE with SAP by archiving historical SAP data, reducing migration scope, ensuring compliance, and enabling secure decommissioning of SAP ECC.
Here’s what most RISE with SAP pitches leave out: SAP itself estimates that up to 70% of the data sitting in a typical ECC system hasn’t been touched in over a year. That’s not a footnote. That’s most of what you’re about to pay to move.
Every RISE with SAP conversation starts the same way: timelines, cloud infrastructure, licensing bundles, go-live dates. What it almost never starts with is the question that actually determines cost and risk, which is what happens to the data you’re not actively using. Not deleting it. Not necessarily moving it either. Just deciding, deliberately, what stays, what goes, and what gets archived before the migration team ever opens a project plan.
Skip that question and RISE with SAP becomes a bigger, slower, more expensive version of the same ERP you’re trying to leave behind, just running on newer infrastructure. Answer it first, and the entire migration gets smaller.
This piece is for CIOs who have already started the migration conversation yet haven’t addressed the one decision that determines migration cost, complexity, and long-term success: what data should actually move to SAP S/4HANA.
What is RISE with SAP?
RISE with SAP is SAP’s commercial and operating model wrapped around bundling infrastructure, licensing, and managed services into one contract, typically aimed at large enterprises already running SAP.
RISE with SAP vs GROW with SAP
RISE with SAP is not the same thing as S/4HANA, and it’s not the same thing as GROW with SAP either.
GROW with SAP is the equivalent packaging for organizations adopting S/4HANA Cloud Public Edition from a more standardized, greenfield starting point.
| Aspect | RISE with SAP | GROW with SAP |
|---|---|---|
| Target Organizations | Existing SAP ECC customers and large enterprises modernizing complex landscapes | New SAP customers or organizations adopting a standardized ERP for the first time |
| Primary Goal | Transform and migrate existing SAP environments to SAP S/4HANA Cloud | Accelerate adoption of SAP S/4HANA Cloud Public Edition with best practices |
| Deployment Model | Primarily SAP S/4HANA Cloud Private Edition (or supported transition paths) | SAP S/4HANA Cloud Public Edition |
| Implementation Approach | Brownfield, Greenfield, or Selective Data Transition | Primarily Greenfield with standardized processes |
| Customization | Supports significant customization and complex business requirements | Favors standard SAP best practices with limited customization |
| Ideal For | Enterprises with large data volumes, multiple legacy systems, and industry-specific processes | Growing businesses seeking rapid deployment and standardized operations |
| Migration Complexity | High, due to legacy applications, historical data, custom code, and integrations | Lower, since implementations start with a clean, standardized environment |
| Historical Data Strategy | Critical because decades of ECC data must be migrated, archived, or retained separately | Important but generally less complex due to limited legacy footprint |
| Commercial Model | Subscription combining software, infrastructure, and managed services under one contract | Subscription package focused on rapid cloud ERP adoption and enablement |
RISE with SAP is designed for enterprise transformation, while GROW with SAP is designed for rapid, standardized cloud ERP adoption. Regardless of which path you choose, your planning should be around historical data.
The 2027 Deadline Is Real, But It’s Not the Whole Story
SAP has confirmed mainstream maintenance for SAP ECC 6.0 ends in 2027, with extended maintenance available through 2030 at a premium. After that, ECC customers face limited security patching and shrinking compatibility with newer infrastructure.
The instinct this creates is urgency, and urgency is not wrong. But urgency aimed only at the ERP migration, without a plan for the data left behind, tends to produce rushed decisions rather than good ones.
The deadline is a countdown to a decision about what happens to years of transactional history, and whether that history moves, stays parked in a legacy system nobody wants to pay to keep alive, or gets handled properly before the clock runs out.
Delaying the decision doesn’t freeze the problem. It just means the eventual migration scope, and the eventual bill, keeps growing.
Greenfield, Brownfield, Bluefield: Three Paths That All Skip the Same Step
Every RISE with SAP conversation eventually lands on the same three-way choice.
Greenfield means implementing S/4HANA from scratch, no legacy data, no legacy configuration, and a clean build against a defined project scope.
Brownfield is closer to lift-and-shift: convert the existing SAP system to S/4HANA, carrying historical data and configuration forward as-is.
Bluefield, more commonly called Selective Data Transition, sits between the two: organizations choose which business processes and entities migrate, while leaving the rest in the legacy environment.
Selective Data Transition is usually presented as the flexible, risk-managed option, and in terms of process design, it is. But look closely at what it actually resolves. It answers what moves. It does not answer what happens to what doesn’t.
That unselected data doesn’t disappear. It sits in a legacy environment that the organization is nominally trying to retire, still subject to retention requirements, still needed for the occasional audit or reporting request, still costing license and infrastructure fees to keep breathing. Selective Data Transition solves half the problem and quietly hands the other half back to whoever inherits the “we’ll deal with it later” pile. Later rarely arrives on schedule.
Before you go read: Difference Between SAP ECC and S/4HANA: The Cost Decision Every CFO and CIO Must Make
The Hidden Complexity Behind Every RISE with SAP Migration
Ask CIOs why RISE with SAP adoption stalls and the answer rarely traces back to skepticism about cloud infrastructure. It traces back to the sheer complexity of figuring out what to do with everything that’s accumulated inside ECC: heavy customization, merger-driven system sprawl, years of transactional volume that nobody fully catalogued as it built up.
Years of SAP ECC customization make the challenge even greater. Most enterprises have accumulated
- custom ABAP developments
- Z tables
- user exits
- Enhancements
- bespoke workflows and reports
- integration with third-party applications
Every one of these must be evaluated during migration. Should it be rebuilt? Can standard S/4HANA functionality replace it? Does historical data still depend on it?
Each customization that survives increases project complexity through additional code remediation, regression testing, validation cycles, and integration testing. Historical data often remains tightly coupled with these custom objects, making a simple lift-and-shift both costly and technically risky.
This complexity produces a very specific kind of paralysis. Migrating properly takes twelve to eighteen months or more depending on scope. Waiting doesn’t make that scope smaller. It makes the specialist talent pool thinner, since experienced ECC consultants are migrating their own careers toward S/4HANA work as demand shifts.
It also means whatever migration eventually happens gets compressed into a shorter window, under more pressure, often at higher consulting rates because the easy calendar slots are already taken by organizations that moved first.
The organizations that treat this as purely a scheduling and infrastructure problem tend to arrive at the same wall eighteen months later: a migration project that technically succeeded but left the data question exactly where it started.
There is a way to shrink that wall before the project begins, and it has nothing to do with moving faster. It has to do with moving less.
One more insight: SAP Carve-Out Strategy: Managing Historical Data During Divestitures & System Separation
The Part Most RISE with SAP Initiatives Miss
Here’s a pattern worth naming directly: most RISE with SAP initiatives treat go-live as the finish line. Business value realized, project closed, slide deck presented to the board.
But the enterprise data estate doesn’t close when the project does. Whatever’s left in the retired ECC environment, still needs to be searchable for audits. Still needs to satisfy regulatory retention windows that, depending on industry, can run seven, ten, or more years past the transaction date. Still needs governed access for the finance team that gets a request from a regulator eighteen months after everyone assumed the old system was switched off.
McKinsey’s research on technical debt found that CIOs surveyed estimated technical debt amounts to 20 to 40 percent of the value of their entire technology estate before depreciation, and more strikingly, almost half of organizations that completed modernization programs failed to actually reduce that technical debt.
Read that again in the context of RISE with SAP: nearly half of modernization efforts don’t solve the underlying problem they were funded to solve. A migration that moves the ERP but leaves an ungoverned legacy data pile behind is a strong candidate for landing in that unhappy half.
Modernization that treats data lifecycle as an afterthought isn’t modernization. It’s a very expensive lateral move.
Plan your next step with SAP ECC end of maintenance
The One Insight That Changes the Migration Math
Here’s the thesis worth sitting with the biggest opportunity in a RISE with SAP migration isn’t moving data faster. It’s reducing how much data needs to be moved in the first place.
Every gigabyte of historical, inactive, or rarely accessed data that gets dragged into the new S/4HANA environment adds to the migration timeline, adds to testing scope, and adds directly to the ongoing HANA in-memory computing footprint, which is priced and sized around the total data volume it has to hold in memory.
Archiving that historical data properly before migration, rather than migrating it and archiving it later, or worse, leaving it behind ungoverned, shrinks the project scope at the exact moment scope is most expensive to carry.
This is the strategic reframe most RISE with SAP guidance misses entirely: a historical data strategy isn’t a nice-to-have cleanup task that happens after the real migration. It’s a lever that makes the real migration work smaller, cheaper, and faster, while simultaneously solving the compliance and decommissioning problem that would otherwise resurface eighteen months down the line.
Where Archon Fits in Your RISE with SAP Journey
This is the piece the RISE with SAP conversation has been missing: a way to separate what’s active from what’s historical before migration ever begins, so the ERP move itself carries less weight, costs less to run, and doesn’t leave a half-decommissioned legacy system quietly draining budget in the background.
Archon ArchiveLink for SAP facilitates archiving data into Archon Data Store and enables application decommissioning alongside RISE with SAP programs.
- Purpose-built for SAP archiving and decommissioning:Archon Data Store is a Lakehouse-based archive designed to preserve historical SAP data while enabling complete legacy system retirement.
- Connects to SAP and beyond: Ingests data from SAP ECC, SAP S/4HANA, SAP BW, and 200+ enterprise applications using pre-built connectors, eliminating custom extraction effort.
- Preserves data immutably: Stores records with WORM storage, trusted timestamps, append-only logging, and audit trails to ensure integrity and compliance.
- Automates retention and legal holds: Applies policy-driven retention across applications and jurisdictions while supporting legal holds to prevent accidental deletion.
- Provides unified historical access: Enables users and auditors to search financial, HR, procurement, and other historical records from a single interface, without knowing the originating system.
- Supports complete SAP ECC decommissioning:Once data is archived, SAP ECC can be retired entirely. Historical information remains accessible without maintaining a read-only ECC environment or relying on SAP Basis teams.
- Future-proofs historical records: Archived data remains available even if today’s S/4HANA environment is replaced by another ERP in the future.
- Reduces migration costs before go-live: Archiving inactive historical data lowers migration scope, infrastructure costs, testing effort, and project timelines.
- Eliminates long-term legacy costs after go-live:Enables on-schedule SAP ECC retirement, avoiding years of unnecessary licensing, infrastructure, and maintenance expenses for systems kept alive solely for historical access.
For a CIO staring down a RISE with SAP decision, the practical sequence looks like this: identify what’s genuinely active and needs to move, archive everything else with Archon ArchiveLink before migration begins. Then perform the Full ECC retirement, without the compliance risk.
Start your SAP ECC Migration Assessment for free or book a personalized demo with an Archon expert to get a Legacy System Health Score to help reduce migration complexity and find the fastest path to SAP ECC decommissioning.
