Joon Han | Digital Diagnostics
Power BI & Dashboarding
A collection of case studies using Power BI to model data, design dashboards, and translate business patterns into decision-ready views.
These projects show how interactive reporting, KPI design, and DAX-based analysis can reveal concentration, performance drivers, and business structure.
DAX · Data Modeling · KPI Design · Interactive Reporting · Business Intelligence
Olist Marketplace Dependence Analysis
Focus:
Power BI · DAX · Data Modeling · Marketplace Business Intelligence
A Power BI case study examining whether Olist’s marketplace growth was broadly distributed or shaped by visible seller and category concentration.
Key insight:
Seller concentration was meaningful, but not extreme. The top 10 sellers contributed 13.15% of total revenue, while the top category contributed 9.26%, suggesting growth was broad enough to show participation but still shaped by leading sellers and categories.