Advanced Data Modeling and Shaping with Power BI — Lesson 4: Optimization and Model Governance

Learning Objectives

• Reduce cardinality, unnecessary columns, ambiguity, and expensive transformations
• Review model size, refresh behavior, DAX efficiency, and visual query patterns
• Document lineage, ownership, definitions, testing, and improvement priorities

Detailed Topics

• Reduce cardinality: Reduce cardinality, unnecessary columns, ambiguity, and expensive transformations
• Review model size: Review model size, refresh behavior, DAX efficiency, and visual query patterns
• Document lineage: Document lineage, ownership, definitions, testing, and improvement priorities

Guided Demonstration

1. Review the requirement, users, data, dependencies, permissions, risks, and expected result.
2. Demonstrate the relevant configuration, application, automation, analysis, or administration workflow step by step.
3. Capture settings, outputs, logs, screenshots, calculations, test results, and other useful evidence.
4. Compare the observed result with acceptance criteria and explain any corrective action.

Hands-On Activity

Optimize a model and complete a governance checklist.

• Document assumptions, prerequisites, and the planned sequence before starting.
• Complete the activity and preserve evidence of normal, boundary, and failure behavior.
• Record issues, corrective actions, reusable notes, and the next improvement priority.

Scenario Analysis

• Identify the business or technical decision that must be made.
• Compare valid implementation approaches and their trade-offs.
• Consider security, privacy, accessibility, performance, support, and operational impact.

Troubleshooting Focus

• Separate symptoms from causes and collect evidence before applying a fix.
• Check configuration, data, permissions, dependencies, capacity, connectivity, and recent changes.
• Validate rollback, recovery, ownership, user impact, and business continuity.

Validation Checklist

• The requirement, scope, inputs, and expected outcome are clear.
• The selected design or configuration is documented and follows approved standards.
• Normal, boundary, failure, security, accessibility, and operational conditions are reviewed.
• The result is supported by evidence and the next improvement is prioritized.

Lesson Outcome

Learners can explain and apply Optimization and Model Governance in a realistic scenario and validate the result with documented evidence.