- A Business Analyst (BA) is responsible for analyzing the business needs of their clients to help identify business problems and propose solutions. Typical BA activities include requirements gathering (functional and non-functional), solutions development, project planning, etc.
- A Data Architect, on the other hand, is responsible for developing and maintaining a formal description of the data and data structures - this can include data definitions, data models, data flow diagrams, etc. Typical activities include data modelling, ETL (Extraction / Transformation / Load) processing, data mining, data analysis, etc.
The better answer, then, in my opinion, would be a Data Architect. In most scenarios, the Business Analyst would document the requirements while the data architect would perform the actual mapping of the data.
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