Time spent on project work was traced by every team member using the JIRA tool. As a result of analysis of that data, we could obtain an average of the total time spent on fixing a single defect for each phase of the project (TableĀ \ref{tab:costs}). The amount of time spent on quality assurance, together with the number of hours spent and number of defects fixed, divided by phases, are shown in TableĀ \ref{tab:scenar1}.