Lagrein

Lagrein is a tool that supports managers and developers in exploring how a software system has been developed. It is able to identify which components required more effort or were more complex to develop. It supports the visualization of multiple metrics at the same time supplemented by three major features

1. it links individual requirements to portions of the source code expected to implement them;

2. it couples the source code with the effort spent in producing it; 

3. it visualizes the overall evolution of a software system.

 Such features allow the manager to measure, with a certain level of approximation, the effort required to implement single requirements and to understand the state of health of a software system.