An SAP S/4HANA upgrade is more than a technical version change. It requires coordinated planning across the application stack, database, operating system, infrastructure, integrations and operational procedures.
Many upgrade challenges can be identified before SUM is started. A structured technical assessment helps uncover compatibility gaps, capacity constraints, outdated components and operational dependencies that could otherwise increase downtime or introduce unnecessary risk.
This article highlights the key technical areas organizations should review when preparing an SAP S/4HANA upgrade.
Start with SAP Readiness and Compatibility Checks
The technical assessment should begin with the target SAP S/4HANA release and the requirements associated with that transition. SAP Readiness Check, Maintenance Planner, simplification items and relevant SAP Notes provide important input for identifying prerequisites and potential impacts.
The review should also validate the compatibility of the operating system, SAP HANA revision, SAP kernel, installed add-ons and software components. Finding these dependencies early allows prerequisite upgrades and remediation activities to be completed before the main upgrade window
Validate the SAP HANA and Infrastructure Foundation
SAP HANA should be reviewed as part of the upgrade path, not as an isolated component. Confirm that the current and target HANA revisions are supported, and determine whether a database upgrade is required before the S/4HANA upgrade
Infrastructure capacity should also be validated before execution. Review CPU and memory utilization as well as available space for the database, log volumes, SAP application directories and SUM working directories. Capacity constraints discovered during an upgrade can significantly affect execution time and, in some cases, interrupt the process
For environments using SAP HANA System Replication or other high-availability configurations, the upgrade plan should explicitly address replication status, takeover procedures, synchronization and the sequence in which database components will be updated
Prepare the Software Update Manager Strategy
The Software Update Manager (SUM) is at the center of the technical upgrade, but successful execution depends heavily on the preparation completed before the tool is started.
SUM requirements, supported versions and required patches should be validated against the source and target releases. The team should also review filesystem capacity, temporary space requirements, background processing capacity and any technical prerequisites identified during the preparation and pre-processing phases.
For production environments, the SUM strategy should be aligned with the available maintenance window. Downtime optimization options, expected runtimes and lessons learned from DEV and QAS should be incorporated into the production plan rather than treating each system as an independent upgrade
Review Interfaces and Technical Dependencies
SAP systems rarely operate in isolation. RFC destinations, web services, middleware, external applications, file interfaces, batch processes and cloud integrations can all introduce dependencies that must be considered during an upgrade.
Interfaces should be inventoried and classified according to their business criticality and technical dependency on the SAP system. Particular attention should be given to integrations that depend on specific SAP components, certificates, connectivity configurations or authentication mechanisms.
A defined validation plan makes it possible to verify critical interfaces systematically after the upgrade instead of discovering integration problems when business processing resumes
Define Backup, Recovery and Rollback Procedures
A successful upgrade plan must include a clear recovery strategy. Before the production upgrade begins, teams should confirm that valid backups are available and that the recovery procedure is technically understood and operationally feasible.
The backup strategy should consider both the SAP HANA database and the components required to restore the SAP application environment. For systems using high availability or replication, the recovery plan should also account for the state of secondary systems and the actions required to re-establish replication after a recovery.
Equally important is defining the point of no return. The project team should understand when rollback remains technically practical, how long recovery would take and who has the authority to make a go/no-go decision during the maintenance window
Build the Cutover Plan from DEV and QAS Experience
Development and quality upgrades should be treated as rehearsals for production. Execution times, technical issues, manual activities, SUM phases and post-upgrade tasks should be documented as the upgrade progresses through the landscape.
By the time production is scheduled, the team should have a detailed technical runbook with expected durations, dependencies, responsibilities and validation checkpoints. Activities that caused delays in DEV or QAS should already have corrective actions incorporated into the production procedure.
The cutover plan should also define clear go/no-go checkpoints. This allows technical and business stakeholders to evaluate the state of the upgrade at critical stages instead of making decisions without predefined criteria
Validate Fiori and Embedded Analytics
For SAP S/4HANA environments, the technical upgrade does not end when the backend system becomes available. SAP Fiori, the Fiori Launchpad, OData services, catalogs, roles and embedded analytics should be included in the post-upgrade validation scope.
Changes to SAPUI5, SAP Gateway components, applications or authorizations can affect functionality even when the core ABAP system is technically healthy. Critical applications and business roles should therefore be identified before the upgrade and incorporated into the validation plan.
Embedded analytics should also be reviewed where applicable, including relevant analytical applications, CDS-based content and connectivity required by reporting or external analytics platforms
Plan for Post-Upgrade Validation and Stabilization
Technical validation should begin immediately after the upgrade and continue through the stabilization period. System logs, dumps, update errors, background jobs, interfaces, work processes and database behavior should be monitored for issues that may not have been visible during the initial technical checks.
Performance should also be compared with the pre-upgrade baseline. Changes in response times, database utilization, memory consumption or background processing can help identify areas requiring additional tuning or remediation.
A structured stabilization period allows the technical team to distinguish isolated post-upgrade issues from broader platform problems and provides a controlled transition back to normal operations
Preparation Reduces Upgrade Risk
SAP S/4HANA upgrades involve many interconnected technical layers. Successful execution depends not only on SUM, but on understanding the complete environment and preparing each dependency before the production window begins.
Compatibility checks, infrastructure capacity, HANA, high availability, integrations, backup and recovery, Fiori and lessons learned from non-production systems should all contribute to a single technical upgrade plan.
The objective is straightforward: identify risks while there is still time to address them, rather than discovering them during the production cutover
Planning an SAP S/4HANA Upgrade?
Konsultica provides hands-on technical support for SAP S/4HANA upgrades, system conversions, SAP HANA, technical assessments and production cutovers.
Contact us to discuss your SAP environment and upgrade requirements