Medallion Architecture

Overview

The Medallion Architecture organizes data pipelines into progressive layers to ensure quality, reliability, and efficiency in analytics.

Layers

1. Bronze (Raw)
   Raw ingested data from source systems. Minimal transformation, only cleaned for parsing errors.

2. Silver (Cleaned / Curated)
   Data is cleaned, deduplicated, and enriched. Suitable for basic analytics and reporting.

3. Gold (Business-ready / Aggregated)
   Fully transformed data optimized for dashboards, ML, and advanced analytics.

Principles

• Incremental processing: Each layer adds value without overwriting prior stages.
• Traceability: Easy to trace data lineage from Gold → Silver → Bronze.
• Reusability: Models at Silver and Gold layers can be shared across multiple labs.

Benefits

• Reduces data quality issues downstream.
• Enables faster experimentation and analytics.
• Facilitates modular ETL development in a multi-lab environment.

Visual Diagram