Migration from Legacy to BDC

As of 2026-05-29

Migration from legacy to BDC is the estate-wide version of the discipline — where the BW path (M070) handles SAP's own warehouse, this addresses the WHOLE legacy estate: aging BW + standalone DWs + non-SAP BI + Access/Excel empires + bespoke platforms. Bring order to the sprawl, don't lift every piece. Inventory first (estate-wide M070 triage): catalogue, measure actual usage (evidence, not assumptions), score on value/complexity/change. Three fates: carry forward (high-value/complex/stable, Bridge M070), re-platform (cleaner rebuilt as governed products/Insight Apps M033/M036), retire (the unused tail + shadow spreadsheets — the migration is the licence to kill it). Default to "justify why this survives", not "migrate everything". Shadow IT is the hidden scope — surface it, capture the real logic, retire the spreadsheet, never let an undocumented dependency be a go-live surprise. Sequence via the wave plan (M068); history follows tiering (M071). Honest (§0i): it's a rationalisation — value is in what you retire too, but rigorous inventory not reckless deletion.