Gap In Burndown Chart

 Do the Data Warehouse Jobs need to run every night to pick up Burndown data? Or can they be run to 'catch up' on failed runs?  For Example using the 'Delta Load Configuration' to pick a date when it last ran successfully.

 So according to this article...

If team members do not update their data by the end of each day, the status of their work items will not be properly reflected in the report. Although updating the status of their tasks will help the trend line to catch up at the next processing point, there is no way to update the history. The task will show as done (finished) on whatever day it is closed, not whenever the work was actually finished.