Business AnalysisBeginner 2 hours

Legacy CRM to REST API Data Mapping

Map customer registration data from a legacy database schema to a new REST API JSON format.

The Scenario

An insurance firm is migrating its client management workflows to a modern SaaS platform. You need to map customer profiles from the legacy SQL database table (`TBL_CLIENT_MASTER`) to the new REST API registration payload (`/api/v1/customers`). The systems use different field names, date formats, and validation constraints.

The Brief

Create a detailed source-to-target data mapping document. Map at least 15 fields (including names, addresses, contact details, policy types, and status flags). Define transformation rules for data types, formatting, and default values.

Deliverables

  • A data mapping spreadsheet/table: Legacy Field Name → Legacy Type → Target JSON Key → Target Type → Transformation/Validation Rules.
  • JSON payload example of the target schema after transformation.
  • A field-level data dictionary detailing validation constraints (e.g. regex for emails, phone numbers, state abbreviations).
  • A mapping exception playbook detailing what to do if mandatory fields are null in the legacy source.

Submission Guidance

Present the mapping grid using a clean Markdown table. Provide validation rules and JSON examples in code blocks.

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