Where should a Data Analyst output data from a Tableau Prep flow to be used for a dashboard?

Outputting data from a Tableau Prep flow to a published data source is optimal for use in a dashboard for several reasons. When a data source is published, it allows multiple users and dashboards to access the same, consistent set of data. This centralization ensures that any updates made to the data flow can be easily reflected across all connected dashboards without the need to manually replace files or data connections.

Publishing a data source also takes advantage of Tableau Server or Tableau Online features, such as permissions and version control, which can help manage data access and the integrity of the data being used in visualizations. Consequently, when analysts work collaboratively or share dashboards, a published data source streamlines the workflow and enhances data governance.

Other options like local .hyper files, while valid for individual use cases, restrict sharing capabilities and do not facilitate real-time data updates across multiple dashboards. External data sources may require additional configurations and can also complicate data management. A Tableau Server session is designed for viewing and interacting with dashboards rather than serving as an output destination for data workflows. Thus, publishing data sources stands out as the best practice for the intended use case.