LiveCycle ES enables you to invoke processes created in Workbench ES using a client application built with Flex. A benefit of creating a client application with Flex and using it to invoke a process is that you have access to a rich set of Flex controls. That is, you can display process data in controls such as a pie chart or bar graph.
The Displaying LiveCycle ES process data in Flex graphs article discusses how to display process data in a client application built with Flex. Basically, you have to first create a process using Workbech ES. Then you can invoke the process from the client application and retrieve the process data. You can then use the process data to populate a control. For more information, check out Displaying LiveCycle ES process data in Flex graphs.