Is it possible to enable a proposal/project be categorized under multiple business units within portfolio management? Currently with 7.5, we are seeing that the filters do not recognize multiple values for the OOTB 'Business Unit' field.
Yes it's not possible and we should be agree that PPM Portfolio Management is not flexiable.
My solution porposal for you is that; 1) Create your Business Unit breakdown or create multible selection field in related request type. 2) Create your own bubble-chart or bar-chart portlet. 3) Create a dashboard which consist of your own portlets and let this portlet show you your portfolio.
Or as my customers do, you can use a BI tool to create your own portfolio management comparision.
IT Governance Professional & PPM Solution Architect