ECC to S/4HANA Migration Made Simple: How DataLink Dynamics Achieved 100% Accuracy

We recently completed a full-cycle migration for a global manufacturing customer —moving more than 30 data objects and ~2 million records from ECC to SAP S/4HANA. The scale and complexity demanded a solution that preserved historical transaction integrity while delivering a clean, harmonized master-data foundation for the new system.

The challenge

The client’s legacy landscape contained widespread duplicate vendor and material master records, inconsistent formats, and tangled transactional dependencies—conditions that risked delayed cutover, reporting failures, and operational disruption on go-live. Solving these issues required both technical precision and business collaboration so that master records could be trusted from Day One.

Our approach

We implemented a harmonization-first, business-led migration: duplicate records were identified and grouped using defined match rules; each group underwent business review to select a single “golden” master record for migration. For non-migrated records, we traced and re-mapped any open transactions to the golden master to preserve historical continuity. Technically, the migration combined SAP Data Services, SAP S/4HANA Migration Cockpit, BAPIs and customer programs, with rigorous simulation, load execution and reconciliation across repeated test cycles. This ensured data fidelity while keeping the process lean and repeatable.

Results & business impact

Our disciplined process delivered a seamless cutover within the planned window: the program achieved 100% critical-data load accuracy and zero showstoppers, enabling accurate reporting and uninterrupted operations from Day One. Progressive test-cycle KPIs demonstrated continuous improvement, validating our simulation and reconciliation cadence prior to production. The outcome: a de-duplicated, audit-ready data foundation, minimal business risk, and immediate ability to run S/4HANA analytics and processes.

If your organization is planning an ECC → S/4HANA move, a harmonization-first, business-collaborative migration can be the difference between a risky cutover and a confident Day-One launch.

Contact DataLink Dynamics to discuss how we can tailor this approach to your landscape and timeline: info@DataLinkDynamics.com