ERP is not just “installation”—it’s operational change. Use this phased checklist:

  1. Weeks 1‑2: As‑Is mapping, To‑Be design, module scope.
  2. Weeks 3‑4: accounts, warehouses, items, taxes, user roles.
  3. Weeks 5‑8: pilot run + department training.
  4. Weeks 9‑10: data migration + scenario testing (sales/purchase/returns).
  5. Weeks 11‑12: go‑live + hypercare support + KPI dashboards.

Tip: assign a process owner per department and document decisions (discount policy, approvals, credit limits).