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Showing results for 'create entities on event'.
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Hi all, I am building a simulation of a system with multiple separators which MemberOutput nodes two different routing policies can occur: 1. Standard Policy In the 'Standard Policy', each separator has its dedicated transporter assigned to it and entities arriving at the MemberOutputNode can only select the defined transporter. To this end, a DataTable has been constructed. 2. Power Hour policy In the 'Power Hour Policy', operations are shifted into a higher gear. We select a maximum number of three nearest transporters whose ride request is 0 and include them in the DataTable which specifies the Transporter Selection. Entities arriving at the MemberOutputNode can now request rides from any transporter in the DataTable. I tried to reference to a DataTable called 'TransporterSelection.EPT' in the Transport Logic of each MemberOutput Node. Each value in the EPT column is cross-referencing to a DataTable in which I try to assign the MemberInput Nodes as a Node Reference State Variable of the Transporter (EPT). Is there any way to dynamically assign more (or less for that matter) Transporters to a TransferNode? Hope that anyone knows how to do this! Cheers, Toon
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Hello, I am writing my master thesis on production system design with simulation modeling. I have designed two models in Simio - one for current production system and one for optimized one. They are both designed in a correct way and they work as they are supposed to. The only difference between them is in path lengths. The difference between results from optimized and current system should be 3 - 5 % but for some reason I get all of the results identical to the last decimal place after running an experiment. I have attached a picture of my path properites and travel logic of entities. My guess is that for some reason path length is not being considered in the simulation. If anybody has any ideas what could be wrong, i would really appreciate your help.
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FullGate version 17 (both side take off).spfx We encounter few problems: 1. Why the plane( entities) only go to one side for waiting to take off but not both side used? 2. Any fomular can i add into the simio? The plane will choose which path to go on the taxiway. Such as the plane on the Node 82 if the taxiway A(path 179) had 3 plane waiting but taxiway B (Path 160) had 1 plane waiting, than the plane will choose taxiway B to wait for take off. Gate.xlsx 30 Departure.xlsx
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Hello I wanna create Blockchain simulation in Simio I have student license, can you please help me how Can i make my topology
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Well, there are two problems in your model: First, there are many gates that are not following the data table. Second: every gate should be on the Gate table, regardless if they will have flights or not. If not, they will create entities on every single arrival of the departure table. You have many gates that are not included on Gate table.
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Hi David, I am trying to get your option 3 to work in my model, as the solutions sounds brilliant. I created an Add-On Process that probabilistically assigns destinations to the Entity and by assigning the destination node to the Entity's State Variable MyDest. In the Routing Logic, I've set the Initial Sequence to the sequence table called Routes that holds all possible routes. However, the entities now only follow the first sequence Routes (Input@LoadingDock9, Input@Sink_HTB), whereas Entities with the destination Input@Sink_RTM should follow the sequence Input@LoadingDock10, Input@Sink_RTM. How can I let the Entity follow a specific sequence from my Sequence Table Routes?
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Server Capacity Depends on # of Seized Resources
Liz Millar replied to nObeso23's topic in SI General Discussions
Hi Nicolas, I would investigate the Server property called Initial Capacity. This sets how many units of capacity are going to be available for the Server. You could also change this during the run by Assigning the Server's CurrentCapacity State Variable. I suggest checking out the SimBit titled "Worker Uses Work Schedule". You can access the SimBits in the Support ribbon in Simio. In this SimBit, I recommend changing the Initial Capacity for the Servers. You could set them to '6' or any value. When you run, you will see that the entities only move into the Process Station when they have successfully Seized the Secondary Resource. So even though there is 6 units available only 1 will be use when the Worker is able to process the entity. You can also experiment with giving the Worker a different Initial Number In System value so there can be more Workers. You will still see the same behavior; the number of entities that move into the Server for processing will be the number of Workers that were available to be seized. Happy Modeling! Liz -
Hi everyone, I am trying to model entities moving from 10 origins (sources) to 10 destinations (sinks). The entities are simultaneously created according to a certain mix (Entity1 (85%), Entity2 (10%), and Entity3 (5%). However, the number of entities created per event is according to a certain distribution. There is an OD-matrix that captures the number of entities moving from origin to a specific destination. Let's say there are 10 destinations, than the destinations of the Entities are determined according to the OD-matrix: Entity1 and Entity2 can move to any of of the sinks. Entity3 can only move to one specific sink. One solution I came up with was to add weights to Connectors and assign destinations using TransferNodes, but I think that this is very inefficient. I then started to work with DataTables, but I cannot figure out how to probabilistically assign the destinations of the entities. My question is: how to model the probabilistic destination assignment of Entities using DataTables in such a way that it is relatively easy and flexible to add or remove Sources/Sinks? I have added the model for you to see, I hope that you can help me! Many thanks in advance Simple_OD_creation.spfx
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This is problematic in Simio because Simio considers only entity length (not width) and only when on a Path or Conveyor. I think the first thing to do is fix the nose to tail problem. If you happen to use Conveyors to model this, there are built-in features to manage spacing while stopped and different spacing while moving. But unfortunately Conveyors are limited to a single direction, so are perhaps not appropriate if this is a bi-directional taxiway. If you are using Paths, you can fix this by making each plane longer when you draw it. For example, if you are drawing a plane that is 50M long and you want it to stay at least 10M behind the plane in front of it, place a nearly invisible dot about 10M in front of the plane's nose, making the total plane length (including safety spacing) be 60M. Although Simio will still put the entities nose to tail, there will be a 10M safety spacing between the physical planes. The problem of conflict at merge points is a bit more tedious to fix. I'd recommend a resource-based approach, like illustrated in the SimBit in Merging Conveyors Controlled by Gate. You can use this approach even when using Paths.
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It sounds like you are already set up to use a Source with Arrival Mode of Arrival Time and the Arrival Time Property of MyTable.TimeOffset (assuming that your table above is named MyTable). If the column named Object in your table above is the entity type you want to create, then specify the EntityType in the source to MyTable.Object. If the entity you want to create is something different, then add that new column to your table (say PassengerType) and specify EntityType as MyTable.PassengerType. -
You may need to create a addon which can automate the copy your data into experimentation grid. Easiest way is to select your excel data and Ctrl-C, and select the experimentation grid (same area size) ,and Ctrl-V.
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Design of Experiments with Import Table
Grant S replied to Grant S's topic in SI General Discussions
Thank you for responding - in that configuration, does that mean I need 100 excel sheets? Right now, I have 100 rows that have the different experiments I want to run, and all the values needed for the node-lists / transporter-lists and entities to be used Thanks for your help! -
How to increase the distence between entity to entity ?
jzhou replied to River's topic in SI General Discussions
@River Maybe you can use a Timer element and set its Interval type to Arrival Table and use Timer's event to trigger a Process, within this process, you can do anything you want use process steps. -
How to increase the distence between entity to entity ?
ViniciusF replied to River's topic in SI General Discussions
To make an entity wait until the runway is free what you could do is set the Initial Traveler Capacity of the Runway path to 1. This way entities will wait at the node before entering the path. I did not understand the first question, but if you need entities to visually appear behind one another, set Allow Passing to False on the path. Alternatively, you could use conveyor instead of path to make entities allign and respect some distance. Hope it helps. -
Hello! So I am using a source that is sending out 9 different entities, each with a priority 1-9. They are listed in a Data table called 'Part Data' This is the 'Table Row Referencing' call I am using in 'Before Creating Entities' in the 'Row Number' section: PartData.Priority.RandomRow I want to switch this to use a Random.Normal(mean, sd) - is that possible with discrete values in the table? Thank you for any help you can provide!
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I used rate tables once, these events per hour does not guarantee that you'll have that amount of entities on the time interval. It varies from replication to replication. Sometimes you'll generate less, sometimes more.
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Hello Gosia, I recommend using two State Variables to record the start and end times using the function TimeNow upon the Vehicle’s arrival to a Node. A Decide step is needed to check if the Current Node is different from the Destination Node and that is when values of the State Variables are assigned using the Assign step. The Processes will be set at the Vehicle’s Add-On Process Triggers On Entered Node and On Exiting Node. You can visit the SimBit section under the Support ribbon and check the SimBit titled “Record Distance Traveled” to see a similar example. Another approach is to create a custom Vehicle Class and use a Level State Variable instead of the two Real State Variables to collect information of the travel time. I suggest exploring the Level State Variable in the Help pages under the chapter titled “States”. I recommend checking the SimBit titled “Using Level States (from project Infection Propagation Using Continuous And Flow)” as well. Best Regards, Khaled
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You can also use produce consume material method to add requirements to a process or processing step. You can see it when you change the process type to Task Sequence from Specific time. You can add more than one material requirement by adding tasks in parallel with same sequence number and specificying the material name and quantitiy that will be consumed for each parallel task. In that way you dont need to create and destroy uncessary entitites.
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Hi, A Separator is creating copies of the entities that enter it, the number of copies depends on a probability distribution, I want the worker to transport all the entities created from the same parent entity at once. Is this possible? I attach the model for better understanding. Thank you so much! Model.spfx -
You could also use the Release Batch Early Triggers to recheck the condition after an event.
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Generating new entinty in combiner
Khaled Khamis replied to xdabroar's topic in SI General Discussions
Hi, A combiner is able to combine 1 or more entities into a parent entity. The number of entities that are batched together is specified in the property Batch Quantity. I recommend looking at the SimBit "Combine Multiple Entity Types Onto Pallets" for an example. Best, Khaled -
Hi there, is there a way to import data from excel into a string list so that i can create a large changeover matrix without having to individually enter each item. Following that, id there a way to populate a change over matrix from excel?
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hello i'm the simio user in south korea i want to make my model flexibily. My model has vehicle and elevator The overall process flow is vehicle take entities to server1, After vehicle arrived to server1, elevator take entities and go to every destination. To work well, Three things are needed for this trend First, i want to do if the vehicle comes to server1 then the elevator goes to upstair Second, the vehecle has to wait until the elevator after been to upstair and arrive to server1 Third, repeat the two steps. how can i solve the problem this model in Model2, not Model1 1veh1eleModel.spfx
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Thank you very much for your help, but simio says I can't use the Release step with the server because I don't have any resources to release. In addition, although the Search step works very well, since I don't have any step that keeps the entities inside the server even if they are not called, they continue to leave the server and merge with entities that should not be merged. If I set the processing time to infinity, despite calling entities with the Search process, the entity does not leave the server. I tried to condition the processing time of each entity according to the "Ventana_de_entrega" state, but as expected, it is not the most appropriate. 21.10.spfx
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Thank you very much for your suggestion! But the condition indicated in the Search step is not met, since entities with any state number leave the server, regardless of the entity's id in the combiner's parentinput. 18.10.spfx
