Custom Code Refactoring

As of 2026-05-29

Custom code refactoring is the hidden scope risk on every S/4 analytics migration. Clients routinely underestimate the refactoring backlog by 2–3× because they conflate 'it works today' with 'it will work after the upgrade'. The ATC scan is the only defensible method to quantify scope before estimation. Three categories dominate refactoring effort: SAPI extractors (3–8 days each), Z-table staging layers (5–15 days), and ABAP transformation routines (2–10 days). Getting these estimates right in the architecture phase prevents emergency rework in the go-live sprint.