By Audrey Gerred
If you’ve ever tried to wrangle data from multiple sources into something clean, reliable, and ready for reporting, you know it can feel like herding cats. That’s where Medallion Architecture comes in—a layered approach to organizing data in a lakehouse that makes the whole process more manageable, scalable, and trustworthy.
Let’s break it down.
Bronze Layer: The Raw Zone
Think of the Bronze layer as your data “junk drawer.” It’s where all the raw, unfiltered data lands—straight from source systems like APIs, logs, files or databases. In Microsoft Fabric, this might be a lakehouse storing files in formats like JSON, CSV, or Parquet or it could be a warehouse. You’re not trying to clean anything here; you just want to capture it all for safekeeping. You never know when you might need that one Allen Wrench from the bookshelf you put together 3 years ago. This layer is great for auditing, reprocessing, or just having a backup of the original data.
Storing raw data in a queryable structure also gives you a powerful advantage: data consistency checks. As you enrich and transform data in the Silver layer, you can easily compare it back to the raw source to make sure nothing’s falling through the cracks. This makes the Bronze layer not just a landing zone, but a critical part of your data quality strategy.
Silver Layer: The Clean Zone
Once the data is in the drawer, it’s time to tidy up. The Silver layer is where you clean, validate, and transform/enrich the raw data. You might remove duplicates, fix missing values, or join datasets together. In Fabric, this often involves using Apache Spark notebooks or Dataflows Gen2 to transform the data and store it in structured Delta tables. This layer is especially useful for data scientists and engineers who need reliable, well-structured data for exploration, modeling, and advanced analytics. It’s clean, consistent, and flexible—perfect for building out deeper insights before the data gets curated for broader consumption.
Gold Layer: The Business Zone
Now we’re talking polished, business-ready data. The Gold layer is where you organize and curate your facts and dimensions—the foundational elements that feed into semantic models and reporting tools like Power BI. Unlike the Silver layer, which is more flexible and often used by data scientists for exploration and modeling, the Gold layer is all about standardization and usability.
In Microsoft Fabric, this layer becomes especially powerful when paired with consumption views. These views are designed with business users in mind—they include business logic, friendly column names, and clear definitions that make the data intuitive and reusable across teams. Instead of every analyst reinventing the wheel, consumption views provide a consistent, trusted foundation for semantic modeling, dashboards, and decision-making.
So, while the Silver layer is great for deep dives and experimentation, the Gold layer is your polished product—ready to be consumed, reused, and trusted across the organization.
Why It Works
Medallion Architecture isn’t just about organizing data—it’s about building trust. Each layer improves data quality and adds value, making it easier for teams to collaborate and scale their analytics. And in Microsoft Fabric, with its unified OneLake and seamless integration with Power BI, implementing this architecture feels natural and efficient. Add consumption views to the mix, and you’ve got a recipe for high-impact, reusable, and business-friendly data.



