On Scrum cross-functional teams pinpoints the lack of a real flow in Scrum and its consequences
In Scrum, there is no mechanism to show the bottlenecks of a process. You can only see that the realization of a task takes a long time or that the task is blocked. You have no idea why or where it is stuck unless you ask the team members. The burndown chart doesn’t help in that matter, when there is a bottleneck you can see some bumps on the graphs but the chart doesn’t capture any information on where is the delay is coming from. “