The Defect Trends report calculates a rolling average of the number of bugs that the team has opened, resolved, and closed based on the filters that you specify. The rolling average is based on the per QA Build.Defect Trends reports are very important for Development/Test Managers and senior management to understand how the Bug/Defect resolve and close rate is.

The following illustration displays an example of the Bug Trends report.

Defect Trends report

Following is the example of Unhealthy Defect Trend
Unhealthy Defect Trends report