You can view the progress of tasks running in the Workbench, or on the CLC Server when the job was launched via the Workbench, in the Processes tab at the bottom left hand side of the Workbench. You can see a progress bar indicating the stage the job is at, and just above that, you can see text describing the stage the task is at.

The percentage progress reported in the Workbench should be interpreted as an indicator of the stage an analysis or action is at rather than an estimate of how much time it will take before that analysis or action is complete.  The progress bar is not overly sensitive to the progression of a particular phase of an analysis or action.

This means that you can often see a rapid progression of the progress bar, or jumps to a higher percentage, or it can seem like the progress bar is stalled at a certain percentage level for quite some time.  Usually the job is running fine, and when the phase the task is on finishes, the progress bar will jump to a higher percentage level.

Simply put, the progress bar is an approximate measure of how far an analysis or action has proceeded in terms of completed steps rather than compute time.

One known issue is that for some tasks, the progress percentage is marked as 100%, while the text describing the process suggests that data is still being written out. The text describing what is happening is more reliable than the percentage completion in this case.