How do you add fields to an SAP-delivered transparent table without modification?

Creating an append structure to add fields to an SAP-delivered transparent table is the appropriate method because it allows for enhancements without altering the original table definition provided by SAP. An append structure is a separate data structure that can be associated with the existing table, essentially extending its fields while preserving the integrity and upgradeability of the standard SAP model.

This approach is beneficial because it maintains the original table's functionality, ensuring that any future updates or upgrades from SAP will not conflict with the custom additions. SAP supports this practice as a means of allowing customization while still adhering to best practices for maintaining system upgrades.

In contrast, directly modifying the table definition or using database utilities poses significant risks, including potential data integrity issues and difficulties during system upgrades. Defining a structure and including it in the table definition also does not align with the best practices for enhancing tables, as it may not provide the same compatibility and simplicity as using an append structure.

Thus, using an append structure is the preferred and standard-compliant method for enhancing SAP-delivered tables.