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Showing results for ''current number in system"'.
Found 24 results
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I'm trying to initialize a model with over a 100,000 entities of the same type. However, when I do so, I get a warning "the number of active entities in the simulation has exceeded 20,000 objects". If I continue, Simio basically crashes after a few minutes. I tried to scale everything down by a factor of 1000, but then when I try to create entities in quantities < 1, it doesn't seem any entities get created. So my question is how do I balance out the need to have 100,000+ entities and the need to be able to create new ones on a much smaller scale (10s for example). Thanks in advance for any help with this.
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Has anyone had an issue of tokens mysteriously building up and not exiting the system? By using a search step in combinations with create steps what I think is happening is a build up of tokens somewhere without it exiting the system. Would appreciate any help in debugging. There should theoretically be only enough tokens to match the number of entities currently in the system but it seems when the search/create action is occurring it doesn't get rid of tokens. Attached is a file if you run should show the problem occurring around 2.5 hrs. simiohelpexceedinglimit.spfx -
I have recreated a system to see theoretical capacities and it has multiple sources (1 parent and 2 different members that I combine). I have turned off balking because that interferes with my unit mix. I have also changed all buffers to a finite number and crossing logic capacities to 1. Even with all of this, I still hit the 2500 max entities and an error pops up. This system should only be able to hold a couple hundred, so I know I don't need to adjust my capacity size. I made the units stop at the 1st server so I could isolate the issue and it appears to be upon creation or in the combiner. My question is, how can I have unit production pause (not stop) when the buffers and capacities are full? I have attached the file for reference. APS Design 2.spfx -
We are building a model of a medical facility where some patients need to be evacuated out of the model using a vehicle. In its current state, when a patient is in the ward or ICU, it will be determined if they need to evacuate. While they are waiting for an evacuation transport, they will be in a task sequence loop. We would like some way for the patient to seize a spot on the transport, perform the tasks loops, and once the transport arrives at the facility transfer node, the patients break out of their loop, and seize a worker to be carried to the vehicle. We have patients looping correctly and workers carrying the patients to the transport node, but they are not waiting for the vehicle to arrive. Having a condition that breaks the loop when the vehicle is in the loading node is not working because as it leaves its current node does not update quickly enough so entities go to the node that then are not picked up. A potential solution we found was to use the MinimumDwellTimeExpired State variable for the Evac transport in the loop conditional (If transport is dwelling then do not continue the loop and get routed to the transport, if it is not dwelling stay in the loop), however this variable is not public with no apparent way to make it so. We have also tried to make a function in the vehicle to try and mirror the state variable value, but this also did not seem to work as it does not update during the run. -
Hello, I have a network with one source and different sinks. I use add on process on the output of my source to choose the sinks based in the capacity. When I run the model, all created entities destroyed in the sinks correctly but in result part, "TimeInSystem" is equal zero. Due to add on process, is it happen?Should I calculate time in system with Tally? Best, Nadere
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Hello, I have a network that it has several sources and sinks. I set the following properties for each path: 1) Initial Traveler Capacity: 770000 2) Drown to scale: False 3) Logical Length: 150 Miles 4) Allow Passing: False 5) Speed Limit: 90 Miles per Hour. By putting these properties on the link, congestion is occurred in the system. When I run the model that entities randomly choose path and sink, TimeInSystem get different values for minimum, maximum and average in result part. However, when I put sequence for all paths and source, TimeInSystem get the same values for minimum, maximum and average in result part while we have congestion in the network. Can you tell me why the TimeInSystem does not change? Thanks, Nadere
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Hi, We want to count the number of time an extra counter is opened in our model. We tried adding and assign step in the capacity-logic process with the New value to NumberCashier +1 which is our state variable name. We tried referencing to it in an output statistic but it showed 0. What are we doing wrong? Apoteksimulering (1).spfx -
sorry for the trivial question: I have a system in which the source generates three different entities (A, B, C). I want you to generate a precise number of each one. For example, first 100 of type A, then 200 of type b and finally 300 of type c. So they do not have to be generated randomly. how can I do? Thanks in advance Carlo
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How can I schedule a randomly distributed death event for each entity, and pull them out of the system (or perhaps route to a "mortality" sink) if it occurs before they have already left? Somewhat similar to reneging, but I need mortality to be possible during a service, not only in queues. If an entity is removed from service, I also need the seized resources to be released. What I have tried so far: When an entity is created, I provide them with a state variable for TimeTillDeath, lets say exponential(2) hours. This is a real number, not a datetime. As they enter each queue, I set the reneg trigger as ModelEntity.TimeTillDeath subtract any elapsed time since creation, min 0. This works to model mortality while they are waiting for service, but not during a service. Any help is appreciated, KO -
Assign state to a specify number of entities
Luu Khanh Minh posted a topic in SI General Discussions
In my model, I have a separator that will create 4 exact copies of the input entity. I would like to assign different values of states to each of these 4 copies. How can I do so? Thank you! -
I have one data table to create Order entities(based on SimBit - Entity by data table). Each order has properties such as type of Part and number of Parts. Each Order entity needs to reference a Part data table (based on SimBit - Leveled Arrivals) for that type of Part to create all the part entities for that order. Each Order type has an associated Part data table. I'm not sure how to establish the relationship between the order entity and the correct part data table. Any suggestions would be appreciated. Thank you. -
Is it possible to release a resource after a model entity departs the system? I am trying to model a case when an exam room in a hospital is cleaned after a patient leaves the system. The exam room should not be made available to other patients prior to cleaning. It seems the default is to release all associated resources when an entity departs the system. Thanks in advance!
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Hello, I have a very large number of different products that must go through a workstation and each of them have different setup / processing / teardown times. My idea was to create a table and import the data from Excel containing the product name, ratio, and setup times etc. I got that part done, but now I'm stuck. It seems I would need to create en entity with the name of each product? There must be another way? Thanks in advance. Samuel -
Hi, How can I bind a table to an Excel in the model's current directory so that I don't need to do the binding again when running the model from other computers?
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Assume an entity is assigned to a table. So there is a row number associated to each entity from the table. Using a process for the entity, how I can get reference to the row number of that entity in a table. I will create a new entity later and I want to assign the same row number to the new entity. I know I can do the later one with "setRow" step. But I do not know how to find the row number on the fist place.
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Hello I need to change the processing time base on the number of workers available. This should could change during the simulation. I have already solved to change it before to start the simulation, but I cannot do it dynamically. One task is performed in one hour by one worker, but if after 30 min, a second worker is release and come to help, both will finish the task in 45 minutes. Viceversa, if at the beginning of the simulation there are two workers, but one have to go to another task, the worker that stay in the server will take more time to perform the task. -
Hello all, How can I make several stations seize the resource which is currently on shift. Let's say server one needs a resource to process a unit (not for the whole processing time but a fraction of it), to model this process I use the seize, delay and release steps in the process window. If I have 3 shifts of operators how can I make my server seize the one on shift. Given that they have breaks, How can this behavior be incorporated. I tried using the decide step, using the resource state and the capacity allocated, but it did not work. Thank you for your suggestions.
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Hello everyone, In My Model i attached, i have 4 diffrent type of entities. The model is a standart Source-Workstation-Sink model. In my model, entities come to Workstation2 and afterwards they are processing. In workstation2, if entity type is same, there is no setup time but if entity types are diffrent, there is 2 minute setup time. My question, which is very crucial for me at that time is, after all entities came to Workstation2, is there any way to set a variable how many entity type (as we can see in model, the number is 4) came to Workstation2.Inputbuffer.Contents? Or is there any way to see the number of them in a status label after they come to Workstation2.Inputbuffer.Contents? At that point, you may say that why are you using Tables instead of using ModelEntity for each type of entity. I know that i can do it in that way but if i can built the model at the end, i will have a lot of input. Thats why i preferred using Tables. I don't know if it is a simple question or not. However it makes me crazy because unfortunately i cannot find a way, i'm stuck on it. If anyone have an idea or know solution, please help me. Regards, Alper MyModel.spfx
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Server goes off shift after processing current units
sraja2 posted a topic in SI General Discussions
I have a server that works based on a workshcedule. It goes off shift for only 3 hours a day. I would like it to go off shift only after processing the units that have already entered the server. I am not sure of the logic for this. Any help/advice would be much appreciated. Thank You! -
Greetings, I am building a model which requires 20 entities to arrive at the first hour then four hours of break with no arrivals . Then repeat the same pattern of arrival of 20 for one hour and four hours break in between. I have been using the arrival schedule and use the rate of 20 in the first hour and 0 in the next four hours . However I am not getting 20 entities exactly with this arrival schedule and it is always less than 20. Is there away to force the exact number of entities arriving per hour? Thanks M Alseiari
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Hello, I specified a simple sequence of destinations for an entity with a sequence table and I would like to change the symbol of a subclass server depending on the current node destination of this sequence. I tried to make a process with a decide step but I can not find the good expression to get the current node destination. I am new with Simio so I wonder if it is a good way to proceed or if there is a better one? Best regards, -
Hi I want to calculate at certain moment of a simulation the number of entities crossing an area of the facility window. With this calculation I would get a value such as etities/area. how can i do it?
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Just for fun I did a Lotto object that can meet this need. It simply keeps track of what samples have already been generated and prevents reusing a number. LottoGenerator.spfx
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To see the software and hardware required for Simio, view the document here: Simio System Requirements Miscellaneous Notes Apple products like Mac work when running Windows. Many customers have had good results using Parallels or similar products. Simio does work on a Surface Pro as long as the OS is standard Windows 8 not Windows 8 RT. Simio does offer touch screen support.
