Useless and harmful quality assessment metrics

You cannot control what you cannot measure. (c) Tom DeMarco 

All teams are faced with the need to measure and evaluate the development process, testing and project quality. I will tell you how to easily and quickly implement metrics in project processes without complicating the life of the project team and without demotivating specialists.

I will provide practical advice on how to start collecting and interpreting metrics, as well as share what mistakes to avoid:

 1. Metrics for the sake of metrics: because it is customary/necessary /told to do so. 

 2. Metrics as competitions: who entered more bugs into a bug tracker/completed tasks/passed test cases. 

 3. Collect metrics to calculate penalties: in whose code more bugs were found - the looser. 

 4. Collect metrics without further analysis and process adjustments. 

And other effective ways to demotivate, disunite and break up the project team with the help of metrics.