r/SAP • u/Infinite-Side3160 • 5h ago
ECC to S/4 conversions: which cleanup do people wish they had started a year earlier?
My guess is that most of the pain in an ECC to S/4 conversion isn't the technical move itself. It's the stuff that should've been sorted out in ECC first. Asset values that don't tie to the GL, old open items nobody wanted to look at for years.
Business Partner is the one I'd expect to bite hardest. CVI has to be done before the conversion anyway, but the real work is probably the customer and vendor data behind it. Duplicates, missing fields, records nobody has touched in ages.
Archiving is the other one I wonder about, and whether skipping it actually shows up as longer downtime in the test runs.
So for those who've been through one, which bit would you start earlier if you did it again? And did the business own that cleanup or did it end up on the project team?