Hello everyone. A question that makes me very anxious to ask you all. I am a beginner in AIMMS and have a question for the technicians.
I now have 18 nodes ranging from node 27 to node 44 and so on. Some nodes are connected and some are not, as indicated in the program. Now I have to select the paths based on the risk associated with the road (i.e. Building_index in the program), each path has a Building_index and select the combination of paths that has the smallest sum of Building_index from the start point 27 to the end point 44. Finally the solution is solved using MIP.
I mainly don't understand the following questions. Any help is appreciated
(1) How to select the path that minimizes risk based on connections between nodes (I don't know how).
(ii) How to select path segments using binary categorical variables.
(iii) How to restrict that there is only one path from node 27 to node 44 with no backtracking in between and the paths must be connected.
Attached is a less successful example of what I did. It contains source and data files.
Thanks to all!