topic Finding Minimum Facilities for demand with reduction in ArcGIS Network Analyst Questions
https://community.esri.com/t5/arcgis-network-analyst-questions/finding-minimum-facilities-for-demand-with-reduction/m-p/137343#M1386
<HTML><HEAD></HEAD><BODY><P>I am working on location allocation problem for a network consists of 2000 nodes and 2500 lines. I have found the locations of facilities to cover the whole 2000-demand using minimum facilities solver. I have a case when a node (orange color in the figure) either itself or one of the adjacent nodes can be removed from demand. Which one to be removed is my question; I can remove those orange nodes from my demand and solve for minimum facilities but it is not going to give me a global solution for the problem, instead, some adjacent nodes can be removed (only one adjacent node). </P><P>Ex: Demand-21 can be removed from the total demand OR demand-20 (adjacent to 21) can be removed OR demand -22 <SPAN>(adjacent to 21)</SPAN>. The same is true for the other orange-color demand or their adjacents.</P><P>Is there any way (using the model builder or a python script) to do so so that the solver finds the minimum number of facilities for the reduced demand? I am asking because I've tried many cases with known results but did not get the global solution for most of them.</P><P></P><P>Thanks for any idea</P><P>Best regards</P><P><IMG __jive_id="272084" alt="" class="image-1 jive-image j-img-original" src="https://community.esri.com/legacyfs/online/272084_ZIB_57.jpg" style="width: 620px; height: 379px;" /></P></BODY></HTML>Mon, 28 Nov 2016 01:45:08 GMTLanoYado2016-11-28T01:45:08ZFinding Minimum Facilities for demand with reduction
https://community.esri.com/t5/arcgis-network-analyst-questions/finding-minimum-facilities-for-demand-with-reduction/m-p/137343#M1386
<HTML><HEAD></HEAD><BODY><P>I am working on location allocation problem for a network consists of 2000 nodes and 2500 lines. I have found the locations of facilities to cover the whole 2000-demand using minimum facilities solver. I have a case when a node (orange color in the figure) either itself or one of the adjacent nodes can be removed from demand. Which one to be removed is my question; I can remove those orange nodes from my demand and solve for minimum facilities but it is not going to give me a global solution for the problem, instead, some adjacent nodes can be removed (only one adjacent node). </P><P>Ex: Demand-21 can be removed from the total demand OR demand-20 (adjacent to 21) can be removed OR demand -22 <SPAN>(adjacent to 21)</SPAN>. The same is true for the other orange-color demand or their adjacents.</P><P>Is there any way (using the model builder or a python script) to do so so that the solver finds the minimum number of facilities for the reduced demand? I am asking because I've tried many cases with known results but did not get the global solution for most of them.</P><P></P><P>Thanks for any idea</P><P>Best regards</P><P><IMG __jive_id="272084" alt="" class="image-1 jive-image j-img-original" src="https://community.esri.com/legacyfs/online/272084_ZIB_57.jpg" style="width: 620px; height: 379px;" /></P></BODY></HTML>Mon, 28 Nov 2016 01:45:08 GMThttps://community.esri.com/t5/arcgis-network-analyst-questions/finding-minimum-facilities-for-demand-with-reduction/m-p/137343#M1386LanoYado2016-11-28T01:45:08Z