Developer Builds Full Power BI Solution for JCars Logistics Using Star Schema and DAX

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A developer has documented the end-to-end process of building a Power BI business intelligence solution for JCars Logistics, starting from raw data cleaning through to dashboard delivery. The project involved separating raw and cleaned datasets, standardising field types, and removing invalid or duplicate records before any visualisation work began. A star-schema data model was designed with a central FactSales table linked to six dimension tables covering vehicles, customers, locations, sales representatives, payment methods, and dates. Reusable DAX measures — including total revenue, gross profit, average revenue per car, and logistics cost — were created to ensure consistent calculations across all report pages. The final output spans six report pages and an interactive dashboard built around key questions a logistics manager would ask, such as branch performance, sales representative contribution, and revenue trends over time.

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