참고 답변
Data mapping is the process of connecting fields from one system, file, database, or form to corresponding fields in another system.
It is important in migration, integration, reporting, CRM, ERP, banking, insurance, and analytics projects because incorrect mapping can lead to wrong reports, failed transactions, duplicate records, or compliance issues.
As a BA, I usually help define field names, source-to-target mapping, transformation rules, mandatory fields, default values, validations, and exception handling so that business meaning is preserved when data moves between systems.