Does the proposed visualization reveal the problems of the project? To validate that the phenomena perceived from the visualizations are relevant, a statistical analyst who was not involved in the action research team investigated numerical data related to the project. The data contained information about all tasks worked on in the project during one year (6/2012 - 5/2013). Altogether, there were 10 sprints and 461 tasks of which 137 had failed and 226 succeed. Failing in this context means that the lead time of a task exceeded the limit of 30 working days. The limit for failing was chosen to match the actual average sprint length of the 10 sprints examined. Lead time was defined as the time from state In Progress to Ready for Production