Bad Master Data Travels with the Migration: How to Clean Customer, Supplier, Product, and Operational Records Before Cutover

A practical guide to pre-migration master-data cleanup—covering source inventory, entity identity, standardization, duplicate matching, survivor-record review, missing and stale values, source conflicts, customer, supplier, product and operational relationships, legacy-to-target crosswalks, human QA, target-schema validation, import testing, exceptions, and cutover reconciliation.