Why Document?

Documenting Power Query workflows in Power BI is vital for clarity, collaboration, and maintainability. It provides insight into each step’s purpose, aids troubleshooting, ensures compliance, facilitates knowledge transfer, and serves as a valuable reference for future analysis, optimizing overall project effectiveness.


To streamline the documentation process and focus on the most impactful strategies, here are the top four essential practices for documenting Power Query in Power BI:

  1. Descriptive Step Naming: Assign clear and descriptive names to each transformation step within the Power Query editor. Meaningful labels help users understand the purpose of each operation at a glance and facilitate navigation through complex data preparation pipelines. Avoid relying on default names and instead use concise yet informative labels that accurately reflect the nature of the transformation.
  2. Comments and Annotations: Incorporate comments and annotations within the Power Query script to provide additional context and explanations for complex transformations. Comments help document the rationale behind specific decisions, highlight potential issues, and clarify assumptions made during data processing. Clear annotations enhance readability and promote understanding for both current and future users of the script.
  3. Version Control and Change History: Adopt version control practices for managing changes to your Power Query scripts over time. Leverage source control systems like Git or Azure DevOps to track modifications, document commit messages detailing the nature of each change, and maintain a comprehensive change history. Version control enables collaboration among team members and facilitates rollback to previous states if necessary.
  4. Documentation Templates and Standards: Establish documentation templates and standards for Power Query scripts within your organization to ensure consistency and adherence to best practices. Define conventions for naming conventions, formatting guidelines, documentation structure, and metadata tagging. Provide training and resources to empower users to create well-documented and maintainable Power Query solutions.

By prioritizing these essential documentation practices, users can streamline the documentation process for Power Query in Power BI, enhancing clarity, collaboration, and reliability within their data preparation workflows.

Felix Ralphs
Author: Felix Ralphs