Data quality
A nice dashboard can't fix bad event data.
First, check that events are stored complete, unique and in the correct context.
Event coverage
Are query, result, click and order present?
Duplicates
Are the same order or click not counted multiple times?
Store ID
Does store context remain consistent across the chain?
Timestamps
Use consistent time zone and order.
Identifiers
Check session, visitor, product and order ID.
Definitions
Allow dashboards to use the same KPI logic.