What is the appropriate data type for a custom field that tracks a specific Tier 2 support user on a case record?

Using a lookup relationship as the data type for a custom field that tracks a specific Tier 2 support user on a case record makes sense because it establishes a direct link between two records, in this case, the case record and the support user (typically a user record). This type of relationship allows you to associate a single support user with each case, facilitating easy reference to the user’s information, such as their name, contact details, and any other relevant attributes.

Additionally, lookup relationships enable functionality such as report generation based on the linked records, ensuring that information about the specific user assigned to the case can be easily accessed and analyzed. In scenarios where it's crucial to designate responsibility or keep track of users handling specific cases, a lookup relationship provides the appropriate structure while maintaining data integrity and simplicity in data management.

The other options, while useful in certain scenarios, do not suit the purpose as effectively. For instance, a hierarchical relationship is primarily utilized for representing relationships in a parent-child scenario among users, which is not applicable for tracking a support user on a case. A lookup filter is used to limit the records displayed in a lookup field rather than defining the relationship itself. A formula field serves to compute values dynamically based on other fields but does not