Blueworks Live is a hidden jewel among the IBM acquisitions. I was a user of Lombardi Blue Print before IBM acquired Lombardi and have been hooked to it since 2011. IBM has invested in it and made it better. It is invaluable and probably the most essential tool that you need to get started to document how your legacy processes actually work and get all the hidden knowledge from your SMEs into a simple to use [platform] and visualize one's own processes.
Unless the processes are documented and visualized with all the stake holders, it is often hard to come to an agreement on what one has in the organization. Only when one understands what one has in terms of process within the organization, it becomes easy to discuss the limitations and recommend solutions to address those limitations.
Blueworks Live is BPMN 2.0 compatible and can be leveraged as a starting point to embark on a "Business Process (Re-)Engineering or Modeling" program within an organization. It is quite easy to get started, offered as Software as a Service and is priced per user.