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I am trying to make a routing decision based on the Candidate node's routerequestqueue's summation of the entities user-defined property. If there are different types of entities with ex. different priority levels. I would like the routing process to choose the transfernode which has the smallest total sum of it's entities priority level. the transfernode that needs to be chosen also has a routing group attached to its entity destination type rule where its final machine has 0 buffer and due to a blocked destination rule, there will be a queue build up at the transfernode that needs to be chosen. I have thought about using a state variable for each node and using add-on process each time a unit enters and leaves a node but because the main model has many multiple nodes the node's entity priority sum has to be able to be accessed through the candidate.transfernode._________________. For example during the routing step in the process section, I have candidate.transfernode.destinationroutinggroupname.routerequestqueue which gives me the node's number of units waiting, but i need to be able to access the candidate nodes summed queued property. Is there either a way to directly access this information, have looked at the expressions and having a hard time finding something. failed attempt: candidate.transfernode.destinationroutinggroupname.routerequestqueue.population.defaultentity.priority.summation or is there a way to use the add-on process where i am adding/subtracting the priority levels, but somehow attach it to the candidate.transfernode's property Hopefully this makes sense. If you look at the file, please ignore the upper half and focus on the transfer nodes maintransfer, transfernode1 and transfernode1_1. maintransfer has an entered add-onprocess which is the subject of this question. the route process and it's selection expression is what I'm trying to adjust but find a way to express the candidate transfernodes of transfernode1 and transfernode1_1 (which are part of the XferRouting group). I'd like to choose and compare the total summed priority level of each node's queue. Simple_Routing.spfx

I'm making a simple simulation model of a hospital and I'm having trouble with the routing of my model. For instance, a patient first goes through ED and then to OR. if there is no room in the OR, then the patient must stay in ED. How can I model this? I don't want the patient to wait at any input or output buffer, because then it assumes that the ED bed that the patient used to stay in is now free but it actually isn't. Each bed is modeled as a server and there are more ED beds than there are OR beds. Naturally, all ED beds connect to a single transfer node, which then connect to all OR beds.

Hello, Server (reflecting the storage/kitting area) in my push model is connected to multiple servers. I have below conditions to fulfill while routing entities from an output node of this server - After every 5 minutes, 1. Scan through the sequenced entities at kitting area (output buffer) 2. Scan through the output destinations to check if they have space available for transfer. 3. Route all the possible parts in sequence from the origin server. Can someone help with advice or any reference model to replicate this scenario in Simio. Thanks in advance. -Mohmed

Thank you gocken. This is so helpful. It makes things much simpler. I created an example with an entity which uses the worker as a transporter to go to the parent node at the combiner. the batch is created and they move on together. This seems to work well. But, I need to be able to perform the batch selection in a process. This is where things keep falling apart for me. I made the combiner match on member and parent, giving the entities a state variable set to True if those items were to be batched. I want to set this in an add-on process. Further, I need to be able to trigger this process when either a parent or a member entity enter their input buffers. I have an example attached that uses the add-on process. Once the parent enters the input buffer, the parent can choose what to batch. The batched items move on to server1 and the separator. Then, the worker (entity and transport) return to parent input of combiner, but it's empty. The unbatched entity goes to server2 (just to ensure it arrives after the parent). I thought it would leave server2 and trigger an add-on process on arriving at the member input node, but the add-on process is triggered when still at the server2 output node. So, in the add-on process, I transfer the parent to the parent input node (just to get the parent to kick off its own add-on process, but it doesn't know where to search for the member entity because it's still at server2. How do I get a process to fire to determine what to batch whenever either a parent or a member arrives? using combiner.spfx

Hello, One approach you could use is have an initial capacity of 0 at the Enfriado servers to hold the entities in the input buffer queues. During the entered event of the input nodes of the Enfriado servers, you could insert the tokens into a storage element. And a "controlling" server could then use process logic triggered by a scan step that determines if the number of entities in the input buffer queues are greater than 1, that would perform a search of those Storage.queue for the Entity with the longest processing time. To determine the processing time, one has to track it. The real state variable on the ModelEntity, ModelEntity.RealStateVariable, would be created and TimeNow would be assigned before processing. Then that is assigned TimeNow - ModelEntity.RealStateVariable after it processes at the previous servers. Once the entity is found from the storage queue, a transfer step would take that entity and pass it to the Cortador server's input node. The search step could look for Candidate.ModelEntity.RealState1 using a Backward search type and a limit of 1. Once the entity is transferred, the entity can be removed from the storage element. Judy

Cant open your model as I have a commercial license but it sounds like a similar problem I had. On the input buffer of each server, set the capacity = 0. Also, instead of using a storage queue, try using a system like the attached. You need to set the currenttravellercapacities of the paths feeding the servers to 0. Now, when an entity arrives at the node, park the entity. This will transfer the entity to the nodes parking station. Once capacity becomes available on a server, use a search block, based on any server's criteria to search the parking station for the correct entity. Once found, you need to set the currenttravellercapacities of the path feeding the servers to 1 and unpark the entity found. Unfortunately Simio does not have an ExitRankingRule for the queue.

I suggest using Node Lists column in a table (see attached example) instead of using a sequence table, I setup a routing table with steps (representing sequences). The route table is a child of the entity table. The sources in the model are setup to reference row 1 of the entity table in Source1 and row2 of the entity table in Source2. Each step in the route table is associated to a node list....The node lists represent the "OR" condition. If the node list has Input@Server1 and Input@Server2, the transfer node will use the list to either sent it to Input@Server1 or Input@Server2 based on the selection goal. In the attached model, the selection goal "Smallest Value" and the selection expression is "Candidate.Node.AssociatedStationOverload"....This represents the sending the entity to the server least available input buffer capacity. I think this handles the scenario you explained. As for integrating with OPC, I would suggest looking at this example: http://www.simio.com/forums/viewtopic.php?f=12&t=1381 It shows how to build custom steps and firing events using .NET code. If you wanted to communicate with OPC, you would use a custom step to read the OPC server. If you want the OPC server to interact with Simio. you would call a custom event. It is possible to setup the same of integration with an ERP system; although it is not recommended. For ERP integration, I would recommend using a data table with data binding. Since the data in an ERP system is much more static, it can be loaded at the beginning on the model run. Then the data can be referenced in the data table during the simulation run. RouteByNodeListsModel.spfx

This is a very cool library, i have built two very simple examples to test before using it in a simulation in which they will represent Ship to Shore Cranes. First of all, it took me a moment to figure out that "entity destination" on my home node for the crane has to be set to "specific", can this work using "continue" ? Now, on attached example 1, the Crane picks the entity and will wait for an available vehicle to make the transfer, building a queue in the home node for the crane if there is no available vehicle. This is great since it reflects what happens in the actual operations, the crane waits for a truck to be below the crane to drop the container. crane_example1.spfx But there may be interest in simulating the crane dropping the entity into the floor and just keep unloading the ship, this means i now want to drop the entity without the vehicle being available. Is it possible to control this behaviour at will? I was looking for the option of an input buffer of some sort but for now I just add a normal node and allow the crane to drop it there it will build a queue waiting for the vehicle, this can be seen on example 2, I appreciate any ideas, crane_example2.spfx also, I tried scaling the elements and it gave me an error on height, so I was wondering what should i take into account when scaling (changing size) of this elements? I will take a screenshot next time I encounter the error. finally, I will be using this element in my simulation, and i was wondering what are the thoughts on "tulach" question: "5.) Crane and other crane components do generate a lot of data in trace. It would be nice to have possibility to swich this off just for some steps inside crane and co. I used it in a model that has a simulation time of 1 month and this made my trace impossible to filter and analyse." thanks best regards