Defects Find Rate

Definition

The Defects Find Rate counts number of new defects found in a software over period of time (day, week, month).

Calculation
To be able to calculate that metric, it is important that in your defect tracking system you track:

* affected version, version of software in which this defect was found.
* defect creation date

The calculation process:

* for each version of the product, find all defects that affected the version. If you don't track version where the defect was found you can look for all defects for the product.
* group the defects by the creation date and depending on the period you would like to evaluate count number of defects created in each day, week or month.

Dimensions
It should be possible to monitor Escaped Defects Found in following dimensions:

* Affected version, to monitori metric value of any released version.
* Project/Product. To aggregated Escaped Defects Found over all released versions of the project or product.

Usage
Defect Find Rate gives a product owner an idea of how fast new defects are found in the product and therefore how much it can influence the development and release plans.
Presentation
Best presentation is a simple bar chart, where each bar shows number of escaped defects found per (day/week/month/quarter/year). Depending on your requirements you may want to create this chart for a whole company or each product.