Which control should be implemented in an EDI interface for efficient data mapping?

When dealing with an Electronic Data Interchange (EDI) interface, functional acknowledgments play a crucial role in ensuring efficient data mapping. Functional acknowledgments are electronic messages that confirm the receipt of data and validate the structure and content of that data according to pre-set standards. This is vital because it provides an assurance that the data has been successfully transmitted and recognized by the receiving system, preventing issues related to data integrity.

By implementing functional acknowledgments, organizations can identify any discrepancies in the data exchange process immediately, thus allowing issues to be resolved quickly and efficiently. This proactive approach minimizes errors and supports accurate data mapping, which is essential for smooth operations within EDI processes.

The other options do not provide the same level of effectiveness in ensuring data mapping consistency and validation. Key verification may not directly support data interchange processes, while one-for-one checking and manual recalculation can introduce inefficiencies and potential for human error in the mapping process, both of which detract from the automated and efficient nature of EDI operations.