SAP S/4HANA upgrades with business assurance.
Upgrade the technology. Protect the business.
Moving from one SAP S/4HANA release to another — say 1909 → 2023 — is more than running SAP Software Update Manager. SAP standard changes. Custom code can be affected. Interfaces, Fiori apps and authorizations can change, and business processes may behave differently. Even after the technical upgrade succeeds, you still need to prove that financial balances reconcile, payroll is correct, critical interfaces work and core processes continue without disruption. We manage the upgrade as a business-continuity program — not merely a technical upgrade.
What a successful S/4HANA upgrade actually means.
A green SUM screen proves the technical upgrade completed. It does not prove the business is correct. A successful upgrade means:
Our upgrade approach follows SAP-recommended practices combined with proven enterprise upgrade, testing, cutover and business-assurance controls. (We do not claim our methodology is officially SAP-certified.)
Twelve controlled stages — from assessment to hypercare.
Assess
Understand the current SAP landscape — source release, target release, HANA, infrastructure, add-ons, business functions and dependencies.
Assess
Understand the current SAP landscape — source release, target release, HANA, infrastructure, add-ons, business functions and dependencies.
Understand the change
SAP Readiness Check, Simplification Items, SAP Notes, What's-New analysis, functional changes and compatibility.
Understand the change
SAP Readiness Check, Simplification Items, SAP Notes, What's-New analysis, functional changes and compatibility.
Analyze custom code
ATC analysis — Z/Y code, enhancements, BAdIs, exits, APIs, interfaces and obsolete developments.
Analyze custom code
ATC analysis — Z/Y code, enhancements, BAdIs, exits, APIs, interfaces and obsolete developments.
Remediate
Address technical findings, functional changes, configuration impacts and custom-code incompatibilities.
Remediate
Address technical findings, functional changes, configuration impacts and custom-code incompatibilities.
Upgrade sandbox
Run the first production-like technical upgrade using Maintenance Planner and SUM.
Upgrade sandbox
Run the first production-like technical upgrade using Maintenance Planner and SUM.
Adjust SAP modifications
SPDD, SPAU and SPAU_ENH analysis and remediation.
Adjust SAP modifications
SPDD, SPAU and SPAU_ENH analysis and remediation.
Validate
Technical validation, functional validation, Fiori, security, interfaces, batch jobs and data checks.
Validate
Technical validation, functional validation, Fiori, security, interfaces, batch jobs and data checks.
Regression test
Test critical existing business processes and changed functionality.
Regression test
Test critical existing business processes and changed functionality.
Rehearse
Execute a full production-like dress rehearsal and measure real downtime.
Rehearse
Execute a full production-like dress rehearsal and measure real downtime.
Cutover
Execute the controlled production upgrade using a detailed command-centre runbook.
Cutover
Execute the controlled production upgrade using a detailed command-centre runbook.
Reconcile & release
Validate financial, payroll, operational and interface integrity before releasing users.
Reconcile & release
Validate financial, payroll, operational and interface integrity before releasing users.
Hypercare
Monitor the technology and critical business processes until the environment stabilizes.
Hypercare
Monitor the technology and critical business processes until the environment stabilizes.
What we check before we touch SUM.
SAP Landscape
- Source & target S/4HANA versions
- FPS / SPS levels
- SAP HANA version
- OS & kernel
- SAP Fiori architecture
- Add-ons
- Business functions
- Industry solutions
- HA / DR
Custom Developments
- Z/Y programs
- Custom tables
- CDS views
- OData services
- BAdIs & user exits
- Enhancements
- Forms & workflows
- Interfaces
- Custom Fiori applications
Business Processes
- Record-to-Report
- Order-to-Cash
- Procure-to-Pay
- Plan-to-Produce
- Financial Close
- Payroll
- Payments & Tax
- Inventory
- Banking
We assess what actually changes — for your system.
Not every SAP change affects every customer. Our job is to determine which changes matter to your processes, configuration, custom code and integrations.
For every relevant finding we establish
Know what custom code you have — and what the upgrade will affect.
Using the ABAP Test Cockpit (ATC), we review every layer of your custom estate against the target release.
We classify every finding
Our objective is not simply to eliminate dashboard warnings. Our objective is to ensure no unresolved custom-code issue can break a critical business process.
SAP upgrade terminology — without the jargon.
SAP's technical engine used to perform the system upgrade — prerequisite checks, target software import, shadow-system activities, software switching, conversions and technical post-processing.
A temporary environment SUM creates during the upgrade so significant work on the new software level can happen while reducing productive downtime.
A documented SAP change that can potentially affect functionality, data, configuration or business processes.
The technical check used to identify relevant simplification requirements and inconsistencies before an upgrade.
Used to analyze custom code for problems created or exposed by the target SAP release.
Used primarily to reconcile customer changes to SAP Dictionary objects (tables, structures) with the new SAP standard. SAP changed the structure; the customer may also have changed it — we determine what should remain.
Used to reconcile customer modifications and SAP Note adjustments after SAP standard objects have changed.
Used to review enhancements where the underlying SAP object has changed.
Proving that processes that worked before the upgrade still work correctly afterward.
Proving that SAP and dependent systems continue working together.
Business users confirm that the upgraded solution works for their operations.
A production-like practice run of the complete upgrade and cutover.
The controlled sequence that moves the production SAP environment from the old release to the new release.
Formal decision on whether the upgraded environment is safe to release to business.
Enhanced monitoring and support immediately after production Go-Live.
Preparing people for relevant changes to their work.
Upgrade complete does not mean business correct.
A green SUM screen proves the technical upgrade completed. It does not prove that your financial balances, inventory, payroll, invoices or business outcomes are correct.
The Slashnsap principle — Before → After → Reconcile → Explain
Where appropriate, we apply SAP Data Transition Validation (DTV).
Protecting financial integrity through the upgrade.
Testing whether an SAP transaction opens is not enough. We validate whether the resulting accounting remains correct.
General Ledger
- Trial balance
- Company-code balances
- Ledger & account balances
- Currency balances
Accounts Receivable
- Customer balances
- Open items
- Aging
Accounts Payable
- Vendor balances
- Open items
- Payment proposals
Asset Accounting
- Acquisition value
- Accumulated depreciation
- Net book value
Inventory
- Quantities
- Valuation
- Material/plant balances
Controlling
- Cost centres
- Internal orders
- WBS
- Settlement
- Profitability
Payroll requires zero-surprise validation.
A technically successful payroll run can still contain an incorrect business result. For payroll-relevant landscapes we use representative employee scenarios and compare key outputs — before and after.
Scenarios
Outputs compared
Payroll → FI Posting → Payment → Bank Output → Statutory Reporting
Seven layers of testing — from smoke test to volume.
Technical Smoke Test
System health, login, dumps, RFC, jobs, Fiori, OData, email, printing, IDocs and queues.
Changed Functionality
Everything touched by Simplification Items, SAP Notes, SPDD/SPAU/SPAU_ENH, ATC remediation, config, Fiori and authorization changes.
Critical Business Regression
End-to-end processes — Order-to-Cash, Procure-to-Pay, Plan-to-Produce, Record-to-Report, Payroll.
Integration Testing
Validate the full chain: Source → Middleware → SAP → Middleware → Destination → Business Result.
Data Reconciliation
Before/after comparison of critical data.
UAT
Actual business users validate real operational scenarios.
Performance / Volume
Where appropriate — MRP, payroll, billing, payment runs, large interfaces, large reports, month-end jobs.
We practise the production upgrade before production.
A dress rehearsal is not another round of UAT — it is a production-like simulation of the entire upgrade, run end to end so we measure real durations, not estimates.
The project plan tells us how long we think the upgrade will take. The dress rehearsal tells us how long it actually takes — capturing real durations for SUM, downtime, SPDD, conversions, validation, interface restart and business reconciliation.
Technical cutover, transports and reconciliation.
The upgrade window is where discipline matters most — transports, connected systems and the numbers all have to line up before users come back.
Transport strategy & controls
- Transport freeze from a defined point
- Transport-of-copies where needed
- Sequenced, controlled import to production
- RFC & transport-route verification
- Documented back-out plan
Interface & integration cutover
- Freeze interfaces before the window
- Sequence connected systems & middleware
- Restart and verify every interface
- First live-transaction checks per interface
- Release volume only once verified
Reconciliation & manual captures
- Key business & financial figures captured before
- Exports, reports & screenshots kept as evidence
- Re-captured after and compared line by line
- Manual reconciliation where SAP has no automated check
- Nothing assumed — every critical number is proven
A green SUM screen and imported transports mean the technology is in place. Users are released only after interfaces are proven live and the critical numbers reconcile against the captures taken before the upgrade.
A production cutover run as a command centre.
Every cutover activity carries clear accountability — not a to-do list, a controlled runbook. Owned, sequenced, evidenced.
Regression, major defects and rehearsal.
Final cutover plan, interface sequence, business validators and support roster.
Readiness gate, transport controls and backup/recovery verification.
Final communications, technical checks and reconciliation preparation.
Plan your S/4HANA upgrade with assurance.
Tell us your source and target release and where you are today — we’ll walk you through the assessment, the risks, and how we protect the business through the upgrade.