Workflow progress bar, work item execution progress status

Hello Workflow team,

In order to supply better control over workflow execution I would like to implement a kind of dashboard, where the user could see the overall process progress bar — a percentage of approved user decisions out of the total number of user decisions. Later I would like to show this data in WebDynpro UI.

My question is there any easy way to get the number of approved user decisions and the number of total user decisions inside of workflow? What is the best approach to implement such task?

Thanks.