SAP S/4HANA Migration · Brownfield: Executing System Conversion

In a brownfield system conversion the source database isn't SAP HANA yet. Which SUM capability gets you onto HANA as part of the conversion, and why is doing it in one step usually better than running a separate database-migration project first?

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More in Brownfield: Executing System Conversion

The SAP Fiori launchpad is the user's sole central entry to S/4HANA, so why does S/4HANA still need a separate frontend server, and what is that server technically?

You don't want to activate every Fiori app at once. What tells you which apps are actually worth migrating first, and what data drives it?

After converting to S/4HANA, can users keep using their existing SAP GUI transactions and favorites, or do those disappear?

Given that SAP GUI keeps working after conversion, why is adopting Fiori still not really optional, and what is the typical first move in a gradual migration?

Immediately after conversion, what access model should you give end users in the Fiori launchpad, and how do users find the apps for their job?

After conversion the old tables still hold their data instead of being emptied. Why doesn't SUM just delete the old content, and how do you safely remove what you truly no longer need?

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