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  1. If you haven't already done so, I'd start by reviewing the SimBit ResourceSelectionConcepts. It contains several models that explain different types of resource selection. In particular, I'd suggest a combination of the following approaches: Create a table for each Worker (and/or each Server) where columns in the table represent the constraint or exclusions. For example, you might have a server table with columns for each day, and each column might contain a list of workers who can potentially be used on that day. Use resource lists to select from. possibly with exclusion conditions (maybe referring back to a table) of which resources cannot be used on that server and that day.
  2. Hello everyone! I'm new in Simio. I hope you guys could spare a moment to assist me with a challenge I'm facing. I have a problem in my simulation model, I have one entity routed at random to one of two lines for processing. These processes follow distinct sequences as describes as follows. 1st sequence (A): S11 - TN11 - TN21 - S22 - S23 - TN22 - TN12 - S14 - Sink1. 2nd sequence (B): S21 - TN21 - TN11 - S12 - S13 - TN12 - TN22 - S24 - Sink2. I intend to integrate a neural network to predict the average makespan, similar to the Neural Network solution provided in the Sample SimBit Solutions. However, I encountered a discrepancy between the example model and my model. In the example model, there is a "Path" feature, which allows for the definition of specific routes. Unfortunately, my model cannot use the "Path" since my model has selection logic for choose transportation in the transfer node either use crane or vehicle, so I need to use a sequence table for the entity to ensure it follows the desired paths. The issue arises when attempting to utilize the neural network. I need to use the "Select From List" for the "Entity Destination Type" in the "Output@Source1" part (I already made the list of nodes = Input@S11 & Input@S21). However, I cannot use this since I already used the sequence table for the entity. As I know from the SimBit, I need to set "Entity Destination Type" by using "Select From List" with the selection goal = random as a base model, and later I will change it with the neural network output. However, from the beginning of this process, an error occurred, as depicted in the attached image. So, I just think could Simio do this: if entity go to Input@S11 then use the 1st sequence, if entity go to input@S21 then use the 2nd sequence but still using the "Select From List" for "Entity Destination Type" since later I will use the smallest value from Neural Network for the selection goal. I also attached my model below for more understanding about my model. Thank you for helping me. Best Regards, Oey Aldi Winata BASE MODEL.spfx
  3. Hi there, I'm very much a novice, but currently leveraging the logic in VisitAllServersInAnyOrder simbit to ensure an entity visits an entity is never reworked more than once. I've updated the model entity with required state variables and created a "MyServer" to create the "HasEntityVisited" etc etc. I'm using the "Candidate.MyServer.HasEntityVisited==False" logic for the selection condition in the output node routing logic. However, whenever I run the model I get the error message "Referenced definition type "MyServer" does not match executing type "BasicNode". I've gone over and over the various elements and compared to the working simbit, but can't identify the issue. Any help would be greatly appreciated. Thanks in advance. Garrett
  4. Hi everyone! In the project I'm developing I need something similar to what was done on the Simbit "EntityFollowsSequence". The difference is that I need to be able to change the destinations (update the contents of the sequence table) over time (the number of rows of the table can be fixed, although it would be ideal if they could be dynamically created). Could someone please explain how it would be possible to do this? My edition is NOT Enterprise. Thanks.
  5. Hello Vinicius, thank you for you help but I still having problems with the model. I can understand the logic behind of the SimBit "CombineMultipleEntityTypeOntoPallets" but I have some doubts. I change the model adding a combiner, I creted a intergrer model entity state to identify the quantity of containers, and I have a real state to identify the container but I dont know how change the batch logic of the container to each product. In the definitios tab you can see the batch logics. I hope you can help me Best regards. OptimoContenedores3.spfx
  6. Hello, I wouldn't use process for this one. There is a simple approach that you can use by modifying the SimBit "CombineMultipleEntityTypeOntoPallets". You'll need 3 ModelEntity Integer States to identify the quantity required of each Bin according to the Product. Let's say ModelEntity.Big, ModelEntity.Small and ModelEntity.Med. You can modify "Ops_Exited" step to assign those quantities. For the Producto1 for example, you'll have ModelEntity.Big == 1, ModelEntity.Med == 1 and ModelEntity.Small == 0. A little tip: you can use "Is.Producto1" (or "Is.Producto2", etc) on a decide step to identify which Producto is it. Now on the Combiner Object, follow the Simbit and change the BatchQuantity, to ModelEntity.Big, ModelEntity.Med and ModelEntity.Small. This should work.
  7. That's because there is a routing table in this case. That's how it was set in this simbit before I made the updates. I also I tried to set the "Routing Table" as the initial sequence for the entity and I'm still getting the same error.
  8. Does the screen shots not helping? I made the changes from the "DashboardForScheduling" simbit in this case. I attached the simbit example with the changes that I made. DashboardsForSchedulingExamples_RoutingsUpdate.spfx
  9. I used the "DashboardForScheduling" simbit as an example for this case. For the order that is using "FinishedGoodA" material, I want to change the sequence after the welding process is complete if both shape stations are not available. So, I created an alternative sequence table and referenced in the process logic I created. Whenever this happens, I get same type of error message. Do you think this is happening because the normal routing table is referenced at the source object?
  10. Ok I can do a trace and see what I find. Also, I do have different entity/job types getting processed. In my routing tables, I do have the entities specified in the table. I'm trying to use the "ChooseAlternateSequence" simbit as a reference. Is it possible to do this if you have more than one entity type?
  11. Hello, I'm having strugles trying to configure the setup for the next process: some entities have a diferent processing time and setup time, before to enter to be processed in the workcenters, the workcenter have to be cleaned. I looked the simbit, "ServerWithSequenceDependenrSetup" but I'm confused with the configuration of the processing task. I dont know why we have two lines and o why only one have associeted the change-over matrix.
  12. there are several easy ways to do this. 1) Subclass the Resource or Worker object with the only change is to add a property or state (ex PTime) to hold the processing time specific to that resource. 2) Put your process times in a table and reference the correct table row for the doctor that is working. The SimBit WorkerPoolWithEfficiency does something somewhat similar.
  13. 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
  14. 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.
  15. What you can do is set up a table with a column of DateTime Property for the arrivals and change the Source Arrival Mode accordingly. I strongly recommend you guys to take a look on the Simbits available, they are a really good tool to guide you through your first steps into Simio. For instance, you can find the solution for your problem on a Simbit called AppointmentArrivals.
  16. Hi, What you could do is set up another column with the weights (likelihood) of creating each entity type... so you can set up probabilities any way you want it. Look SelectEntityTypeFromTable - SimBit to learn how to do it.
  17. 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
  18. 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
  19. Hi There, I have lots of experience in simulation but I'm new to Simio - my apologies if my Simio vocabulary/conceptualization is off or if this question has been asked already. I'm working to build a queue model simulation with a network of services and multiple staff types. In my mind, it makes the best sense to do this using the standard library of servers and resource pools (to visualize the network for stakeholders and be able to model multiple staff with different schedules that can each respond to multiple services). Right now, I am starting with a single stage M/M/c type queue to make sure that my implementation is correct before scaling this upwards. I checked out the SimBit titled 'Source – Server – Sink' that has three different M/M/c implementations; however, none of them use Resource Pool objects or combine process triggers with the standard library. I was able to implement a basic model that tries to combine a resource pool with a server by triggering separate Seize and Release process triggers on entry to the server object and after the processing time is completed, respectively. It runs without error; however, the results for average time in system (calculated by an average of a tally statistic that is only recorded for every 500th customer/entity), the results are one third less than in a scenario where I don't use a resource pool and set the capacity of the server explicitly, (which I validated against M/M/c formulae results). Does anyone have tips for how to link servers and resource pools and troubleshoot this scenario? Is there a SimBit or other example out there that is relevant? Am I triggering the seize/resource processes at the wrong points in time? Or is my framework for how to conceptualize this in the Simio environment missing a key concept? Thanks!!
  20. Hi Barry, I tried a bit and I am quite sure that PartTypes.HowMuch.RandomRow(RandomNumberStream) works. Use integers for RandomNumberStream to set/get the specific random streams. I tested it on RandomValueFromTable simbit (i.e., PartTypes.HowMuch.RandomRow(0), PartTypes.HowMuch.RandomRow(1)) and get different results for each. Also, when I restart the simulation I got the same results for each, as well.
  21. Check the SimBit project called "Neural Networks" for a detailed example of this new feature.
  22. Hi Everyone: I hope you are all doing well. I've recently been working with Simio throughout my graduate program and thought that it might be nice to create a SimBit for some idea or portion of a modeling situation that is general and that can be applicable to different scenarios. I would like your input for you to help me out in creating a SimBit. It doesn't have to be something fancy or difficult, I would just want to create it and be able to experiment with Simio. If someone has already created a Simple or general SimBit of their own, please don't hesitate to share it, it would only bring more ideas to the table. Thanks in advanced for all your input, and hope you have a great week!
  23. Hello. Under my M.Sc thesis i´m building a catalog of Simbits to address several characteristics of organizational/information-based business processes/workflows that can be difficult to represent in a simulation model. One of the issues that arose was how to verify the Simbits, i.e, how to prove that the solution really does what i mention it does. For example, one common situation in workflow management systems is the ability of a human resource to redo some work-item (activity/task instance) after its completion. The technical approach in Simio involved a Server object to represent a given task and a Worker object to represent the human resource. The worker has a probability of redo entities at that Server. Therefore, my question is: What is the best approach to show that this solution really works? Using the animation capabilities of Simio with Plots, Pies, Status Labels? Using for example Tally Statistics to record how many times the Worker redone the task during simulation time? Using Experiments maybe? I´m open to read your suggestions. PS: After completing my work i would like to contribute with my Simbits. What i need to do?
  24. Hi Jason, I recommend checking out the SimBit, found in the Support ribbon in Simio, titled "Hierachy with Tables". This could show you an idea of how you might use a Repeat Group Property to read in a Data Table at the parent model in to the sub model. Liz
  25. The name of the simbit is: CombineMultipleEntityTypesOntoPallets.spfx
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