# Data issues collab. with squads

This page explains how we handle data *issues* spotted by the Data team with the different squad teams.

A data issue is an occurrence of data in a source system not being as expected. This could include:

- Data models that have changed unexpectedly (think of, we’ve deleted a key column without coordinating across teams).
- Invalid data due to technical constraints (think of, this column should be unique but suddenly it isn’t).
- Data that is clearly wrong business wise (even if it’s valid technically)

The scope of these issues is pretty much SQL Server and the multiple Cosmos DB databases we use for our applications.