I'm using the Control chart to track average cycle time per sprint BUT obviously when the sprint closes, if any tickets remain open, it won't be included in the averages and so the cycle time can look great when the team actually have tickets rolling over.
Is this because it shouldn't be used as an end of sprint metric and more of a snapshot along with other metrics? I'm not finding it to be a useful metric for teams that are rolling over work (I know work ideally should not be rolled over, but it does happen).