S/4HANA migrations from the trenches: what actually de-risks the cutover

S/4HANA migrations fail or succeed long before cutover weekend. The discipline we apply in the first ninety days predicts the entire programme.

Data is the programme

Treat data harmonisation as the primary workstream, not a downstream consequence. Profile, classify and reconcile early; defer this and cutover becomes a guessing game.

Rehearse the unhappy path

Mock cutovers should rehearse the failure modes, not the happy ones. The team that has practised the rollback is the team that does not need it.