View or materialized view?

Hi, If I have a dimension, such as the employee dimension, that needs to be used for more than one key in the fact table, would I create a view or a materialized view for the second dimension? Or is there a different approach?

Neither, really. You just have multiple FKs to the same table based on the role. When you query you assign an alias to each use of the table. Within a typical BI tool, you define those aliases for each use of the table.