Compare the Data Vault approaches in MCHS and X5. What benefits did the new objects (bridge, pit tables) provide?

Data Vault is a methodology for building data warehouses focused on flexibility and scalability. In the emergency services (EMERCOM) and X5 projects, the Data Vault approach was applied considering the specifics of data and business processes.

Bridge tables in Data Vault are used to model complex many-to-many relationships between hubs (key entities). This simplifies queries and improves performance, as relationships are extracted into separate objects rather than stored directly in links.

Pit tables (Point-in-Time) are used for quick access to the data state at a specific point in time, aggregating information from historical records. This significantly speeds up analytical queries, especially when working with time slices.

In the EMERCOM and X5 projects, the implementation of bridge and pit tables provided the following benefits:

• Accelerated analytics due to optimized structures.
• Increased flexibility when adding new relationships and attributes.
• Simplified maintenance and scaling of the warehouse.
• Improved data quality and its historicality.

Thus, the new objects made the architecture more adaptive and efficient for business analytics.