Multi Attribute Utility Analysis Attributes analysis computes decision variables and this feeds into the Utility Analysis to get utility
Equivalent cost analysis also computes decision variables and immediately turns the result into monetary values

This can be simplified to:

Decision Attribute Analysis (computes attributes, simulated or based on mean) and this feeds into both the Utility analysis and the ECA.

I expect to get all the refactoring and testing done, this will be about a weeks worth of work.