Purpose

Defects Average Lifetime (all priorities) shows an average lifetime (in days) for defects on a project, all priorities.

How metric helps

Defects Average Lifetime (all priorities) helps to monitor and analyze quality assurance process in the project.

How metric works

Chart overview

Chart shows Defects Average Lifetime (all priorities) in amount of days. Suggested acceptable indicator value is less then 30 days.

By click on a chart a pop up appears with the following information got from the task tracking system: 

• Issue ID
• Type
• Priority
• Summary

Calculation

Defects Average Lifetime (all priorities) = (number of days when defects were in open and in progress statuses during last 90 days / number of these defects)

where,

Calculation is based on issues in "Open" and "in Progress" states, closed within last 90 days.

RAG thresholds:  Red - metric value > 30; Green - metric value = < 30. 

Data Source

Data for the metric can be collected from a task tracking system (Jira, TFS, Rally, etc.).