Latest Contributions by JaySandhu

By adjust I mean you can take an existing VRP layer and for the Orders, set the Assignment rule to be "Preserve route and relative sequence" instead of the default "Override". Now you can update the sequence numbers and re-solve. This way you can take a solved layer and adjust some stops manually. As far as VRP failing after 300 stops, what version of software are you using and how much memory (RAM) do you have on the machine? What network dataset are you using? It should not crash! Jay Sandhu ... View more

Take a look at this post for how to deal with adding routes to a VRP layer in model builder: http://forums.arcgis.com/threads/87092-Creating-a-VRP-in-Model-Builder-Can-you-create-routes-on-the-fly Jay Sandhu ... View more

Can you check if you have enabled turns in your network dataset? If no, then can you set it to yes when you create the network and then try your edit/rebuild scenario and see if that message goes away? Jay Sandhu ... View more

You can use the Vehicle Routing Problem Solver with the paired orders to model taxi service. See the section on Order Pair class: http://resources.arcgis.com/en/help/main/10.1/index.html#/Vehicle_routing_problem_analysis/00470000004v000000/ Jay Sandhu ... View more

As Joe alluded to in his post, the VRP solver is not the best way to solve high density routing problems as they are really arc routing problems. But if that is all you can use then I can suggest a work flow: 1. Partition your stops into meaningful clusters. You can use Location-Allocation with the maximize capacitated coverage option to get clusters of a  specified capacity. Try to keep the cluster size to what a typical truck may do in one route (few hundred stops) More details here: http://resources.arcgis.com/en/help/main/10.1/#/Location_allocation_analysis/004700000050000000/ 2. Use VRP with the clusters.  Make sure you load in your locations with curb approach set to right-side only. Also set the u-turn policy to intersections or dead ends. You can specify the depot location, dump as well as rules for visiting the dump if the vehicle is full. With VRP you can set additional things such as how much garbage you pick from individual locations, how much time is spent at each location, hourly costs and per mile costs, etc. Do note that there is no guarantee that you will get the best possible route but it will be close and you can tweak the results a bit in the end. Jay Sandhu ... View more

Yes! The capacity at each facility is matched against the amount of demand (demand weight) at each demand location. So you can have demand locations with different amounts of demand and that will be matched against the capacity of the chosen facility. Jay Sandhu ... View more

Service area started supporting time at ArcGIS 10.1 http://resources.arcgis.com/en/help/main/10.1/#/What_s_new_in_ArcGIS_Network_Analyst/016w00000020000000/ With 10.1 you can use the analysis tab to set the start time similar to the route solver. Jay Sandhu ... View more

What is your connectivity policy? End Point or Any Vertex? If it is End Point, then make sure the line that is disconnected (number 42) connects to a line that is also split at the place where they connect. If the other line is not split then you may need to use any vertex connectivity. Jay Sandhu ... View more

If you network dataset has a hierarchy attribute then ArcGIS 10.1 service areas can use the hierarchy to speed up the process of generation of the service areas. http://resources.arcgis.com/en/help/main/10.1/index.html#/What_s_new_in_ArcGIS_Network_Analyst/016w00000020000000/ Jay Sandhu ... View more

Most likely it is running into memory limitations for keeping all the 3000 service areas (and their street traversal in memory). What are the settings: generalized, detailed, etc. If you have the hierarchy ON then it should not have memory issues. You can monitor the memory usage with the task manager and if it is a memory issue and you cannot use the hierarchy option then I suggest you take a look at enabling "chunking": http://support.esri.com/en/knowledgebase/techarticles/detail/30760 Jay Sandhu ... View more

Glad to know it worked. As far as ArcLogistics, it is an end user application that is built on top of the VRP solver in Network Analyst extension. ArcLogistics makes it simpler and more focused to use the VRP capabilities for delivery type applications. But is not as customizable as the VRP solver. In addition to the VRP solver, the network analyst extension has other solvers like the Location-Allocation solver for locating facilities. Jay Sandhu ... View more

What options are you using on the route solver? Are you using "reorder stops to find optimal" The double back can happen when a stop may be on a dead end road or when the curb approach property is not set or other things like time windows. You can minimize this by setting the U-turns at Junctions property to only at dead ends. Most likely you do not have curb approach set properly. So ask this question, do you need to visit the locations from any side? or Do you need to set it right-side only? If yes, then change the stops property to right-side OR you can set it No U-turn. Read more here: http://resources.arcgis.com/en/help/main/10.1/index.html#//004700000055000000 Jay Sandhu ... View more

One the data which takes longer to load, remove the spatial index and create it again. This is to make sure it is not a bad index for some reason. Since you have more than one network dataset in the same feature dataset, do they all cover the same area? I am wondering if the spatial reference may not be correct for one of them. Can you create a new feature dataset and put the slow performing data into that (make sure the spatial reference for the feature dataset matches the feature classes you will put in). Also, how large is the feature class (number of streets) in the slow performing data? Jay Sandhu ... View more

I still do not know what you want the route solver to do with the negative costs? That is, the route solver is trying to find a "shortest" path. Should it be looking at these negative costs to find the path? OR do you simply want to sum up costs along a path? If that is the case you can do that by using the accumulate option. You can bring up the route layer properties and on the accumulate tab, check on the impedance attributes you want to sum. E.g., if you have a travel time impedance and a length impedance in your network dataset, you can solve on (minimize) travel time and accumulate the total distance of that route. Jay Sandhu ... View more

That process should take a minute not hours. Most likely you do not have a good spatial index on your street feature class that is taking part in the network dataset. You should bring up the properties of the street feature class in catalog and click on the Indexes tab and see if the index exists. Create it or delete and recreate it. Another thing you can do when you have to reuse the same points many times for loading into different NA layers AND your network dataset is not changing, you can use the Calculate Locations tool to pre-compute the network locations and then load them into the NA layer using the network locations fields (not geometry) option. Jay Sandhu ... View more