SAP Readiness Check is a self-service tool designed to analyze an existing SAP ERP system in preparation for a "System Conversion" to SAP S/4HANA. A key function of this tool is to perform a detailed analysis of the source system's data footprint and usage. Based on this analysis, it provides specific sizing estimations for the target SAP S/4HANA system, particularly for the SAP HANA database memory and disk requirements. This is a critical input for planning the hardware and infrastructure for the conversion project.

A. SAP Business Accelerator Hub is a central catalog for SAP and partner APIs, pre-packaged integrations, and other digital content; it is not used for system sizing.

B. SAP Transformation Navigator is a strategic planning tool that helps customers create a product roadmap for their digital transformation, not a technical sizing tool.

D. SAP Digital Discovery Assessment is a questionnaire-based tool used in the Discover phase to understand business requirements and scope the project, not to perform technical system analysis for sizing.

1. SAP Help Portal

SAP Readiness Check for SAP S/4HANA. In the section "Available Checks

" the "SAP S/4HANA Sizing" check is detailed: "The SAP S/4HANA sizing check provides an initial sizing estimation for the target SAP S/4HANA system based on the current utilization of your source system and data-driven models."

2. SAP Activate Roadmap Viewer

Transition to SAP S/4HANA. In the Prepare Phase

the task "Execute SAP Readiness Check for SAP S/4HANA" is a key procedure. One of its primary deliverables is the "Sizing" result

which is essential for subsequent project planning.

3. openSAP Course: Guide Your SAP S/4HANA Project to Success. Week 1

Unit 5

"Transition to SAP S/4HANA

" describes the purpose of the tools. It explicitly positions SAP Readiness Check as the tool for technical analysis of the existing system

including sizing

for a system conversion scenario.