Hi Graham

I think this work is also "deconstructing complexity" or perhaps "visualising complexity".  One of the issues with complex projects (see http://www.defence.gov.au/dmo/proj_man/Complex_PM_v2.0.pdf for a quick run down on what is now being defined as Complex Project Management) is the management of stakeholders and the complexity of the relationships.  Additionally, there are numerous other complexities in Complex PM and BNA, as we define it, will go a long way to "dipping" into that complexity to make sense of it and hence then make some decisions around what has been discovered to progress the project.

cheers Pat