Dashbuilder is packaged and automatically ready to use with jBPM 6 workbench (https://www.jboss.org/jbpm). By doing so, you will get several process and task related dashboards, that are connected to jBPM history log.
They will provide, for example, an overview of the running and completed processes and tasks. Different sort of reports and indicators will become available for BPM monitoring, including time related (i.e. average task durations) or instance related (i.e amount of active processes).
You can find the instructions to install this flavour of Dashbuilder at http://docs.jboss.org/jbpm/v6.0/userguide/jBPMGettingStarted.html
Read more about this integration at http://docs.jboss.org/jbpm/v6.0/userguide/chap-bam.html