Provide an example when you initiated changes in DWH, pipeline, or data model yourself.

In one of the projects, I noticed that the current data model in the DWH did not allow for effective analysis of user behavior by time of day, as there was no dedicated dimension for time intervals.

I proposed adding a separate time table with details by hours and minutes, as well as modifying the ETL pipeline to add corresponding time keys during data loading. This enabled analysts to create more accurate reports and identify patterns in user activity.

After implementing these changes, query performance improved, and the business gained new insights for optimizing marketing campaigns.