I'm looking to rank how critical a given subset of road segments are within a transportation network by comparing how many people would loose access to a set of facilities if one road were closed versus another. I'm trying to do this using a closest facility analysis with a road network in which I've created a parameterized attribute that allows me (in the ArcMap interface) to supply the id for a road segment that is then dropped from the analysis. Once I got this working, I wanted to apply the concept in Model Builder, and iterate through a list of roads to remove, and then re-solve, the closest facility problem for each iteration. The problem is I can't see how to specify the value to use for my parameterized attribute through the Model Builder interface.
Does anyone know if this is possible, and if it is, how to make it work?