Season 1

Namaste Power BI

Episode 13

Validation & Testing

⏱ 30:00

Episode Summary

How to verify your Power BI reports produce correct numbers — cross-validating with source data, using DAX debugging techniques, and building trust in your output.

This is Episode 13 of the free Namaste Power BI course on DevWithData — covering validation & testing. Watch the video above, then pass the MCQ checkpoint to unlock the next episode and update your Data Readiness Index score.

Key Takeaways

→Always cross-validate totals against the source database
→Use a blank page with matrix visuals to debug measure behavior
→ISFILTERED and HASONEVALUE help debug unexpected context
→Performance Analyzer reveals which visuals are slow and why

⚠ Common Interview Pitfalls

•Publishing reports without verifying numbers against the source
•Debugging in a visual instead of an isolated matrix
•Trusting grand totals without checking they aggregate correctly

Official Reference

Deepen your understanding with official Microsoft documentation.

PL-300 Official Training Course

Microsoft's official instructor-led training for the Power BI Data Analyst certification.

https://learn.microsoft.com/en-us/training/courses/pl-300t00

Power BI Documentation

Complete reference for Power BI Desktop, Power BI Service, and Power BI Embedded.

https://learn.microsoft.com/en-us/power-bi/

Content on DevWithData is original and inspired by official Microsoft resources. The links above point directly to Microsoft Learn — always the authoritative source.

← Ep 12: Context Transition

Ep 14: MEGA PROJECT 1: Sales Dashboard →

Episode Checkpoint

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