Complete Guide to SAP Readiness Check for ECC to S/4HANA Migration

Migrating from SAP ECC to SAP S/4HANA is a strategic move that promises enhanced business processes, real-time analytics, and future-ready capabilities. However, the complexity of this transition demands thorough preparation. This is where the SAP Readiness Check plays a pivotal role.

In this guide, we’ll dive deep into what the SAP Readiness Check entails, why it’s essential, how to interpret its results, and common roadblocks encountered — all supported by practical examples and KPIs critical to your migration success.

What Is SAP Readiness Check?
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SAP Readiness Check is an automated tool offered by SAP that assesses your current ECC system to determine its preparedness for conversion to S/4HANA. It examines your system landscape, installed software components, custom code, simplification items, and business processes, producing a comprehensive report.
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The report highlights technical and functional readiness, pinpointing areas requiring attention before migration, such as obsolete components, incompatible customizations, and necessary SAP Notes.

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Key Features of SAP Readiness Check:
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• Simplification Item Analysis: Identifies changes in functionality and deprecated features.

• Custom Code Impact: Flags incompatible custom code objects requiring remediation.

• Data Volume and Usage: Assesses data size and usage patterns to guide data management strategies.

• Business Process Analytics: Evaluates key business KPIs for continuity post-migration.

• Add-on Compatibility: Reviews installed add-ons and their S/4HANA readiness.

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Why Is SAP Readiness Check Essential?
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Migrating to S/4HANA isn’t just a technical upgrade — it’s a fundamental transformation of your ERP landscape. Without proper assessment, you risk unforeseen downtimes, costly rework, and business disruption.

The readiness check helps you:

• Plan Efficiently: Allocate resources and timeline realistically by understanding scope and complexity.

• Mitigate Risks: Identify technical blockers and missing prerequisites early.

• Optimize Migration Path: Prioritize remediation of critical issues like outdated SAP Notes, missing support packages, or incompatible customizations.

      •  Align Business KPIs: Ensure core operational metrics like open payables, overdue deliveries, and automation rates remain on track through migration.

How to Run the SAP Readiness Check
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1. Prerequisites:
   Ensure your ECC system is on at least EHP7 or EHP8, with required support package levels applied. Install SAP Notes related to readiness checks (e.g., 2612179, 2903677).

2. Data Collection:
   Run the analysis programs /SDF/RC_START_CHECK or use the SAP Readiness Check Fiori app. This uploads system data securely to SAP’s cloud service.

3. Report Generation:
   Access your personalized SAP Readiness Check report via the SAP ONE Support Launchpad. The report is interactive and downloadable in Excel or PDF formats

Interpreting the Readiness Check Report:
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• Simplification Items:
  Lists functionalities deprecated or changed in S/4HANA. For example, tables with data aging or CDS views requiring adjustment.

• Custom Code Analysis:
  Flags custom programs or function modules incompatible with S/4HANA standards, requiring correction or rewriting.

• Business Process KPIs:
  Highlights critical metrics such as overdue payables (KFFI000202), automation rates in purchase orders (KPPURCH241), and production order usage (KPPP000190). Maintaining these KPIs post-migration is vital for business continuity.

• Add-on Compatibility:
  Checks if your installed add-ons (e.g., SAP Fiori apps, cloud extensions) are supported or require upgrade.

• Technical Compatibility:
  Identifies missing support packages, obsolete SAP Notes, or kernel versions that can cause migration blockers.

Common Roadblocks and How to Address Them
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During readiness checks and actual migration projects, teams face several challenges:
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• Missing Support Packages or Notes:
  Example: SAP Note 3061414 is a prerequisite but often missed. This note includes manual correction steps essential for system integration readiness.

• Function Modules Not Found:
  Errors like “Function /SDF/START_DVM_RC_ANALYSIS does not exist” indicate missing or outdated function modules. Installing SAP Note 2612179 resolves this.

• Dump Errors During Analysis:
  Runtime errors such as DATA_OFFSET_NEGATIVE during RC_COLLECT_ANALYSIS_DATA (SAP Note 3006484) require patching and kernel updates.

• Custom Code Incompatibilities:
  Certain legacy custom developments may not align with HANA-optimized CDS views or the new data models in S/4HANA.

• Incomplete Prerequisite Installation:
  Readiness Check depends on multiple prerequisite notes like 2903677 for Simplification Item Effort Driver or 2745851 for Business Process Analytics.
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Addressing these roadblocks early — through a structured SAP Note implementation plan, kernel upgrades, and custom code remediation — ensures a smoother migration experience.

Business KPIs: Why They Matter During Migration!
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Maintaining critical business KPIs is essential to avoid operational disruptions. Key examples include:

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• KFFI000202: Overdue and open accounts payable items

• KPLE000110: Outbound deliveries overdue for goods issue posting

• KPPP000140: Automation rate for production order creation

• KPPURCH241: Automation rate for purchase order creation

• KPSD000240: Automation rate for sales billing document creation

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Tracking these KPIs helps measure the migration’s impact on core processes and enables targeted improvements during cutover.

Making Your SAP Readiness Check Work for You
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The SAP Readiness Check is a cornerstone of your migration strategy — it’s not just a checkbox but a detailed roadmap to guide technical, functional, and business transformations.
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By thoroughly understanding its reports, systematically implementing required SAP Notes, and proactively mitigating identified risks, your transition from ECC to S/4HANA will be more predictable, less risky, and aligned with your business goals.
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Want to learn more about SAP ECC to S/4HANA migration readiness?
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Explore our comprehensive SAP migration services and accelerate your digital transformation journey with confidence.

Reach out to us at contact@sapvista.com

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