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piedz

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    piet
  • Last Name
    Zeegers
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    TU Delft

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  1. I'm still experiencing the same problem and haven't been able to fix it. I could use a regular arrival table, but then my pattern would not be a non-stationairy poisson process. So I think that I really need to use these rate tables, but somehow the inputs of the rate table don't reflect the outputs.
  2. Thanks, I have done that incorrectly in previously indeed! In the meantime I haven't been able to solve my initial problem, but I will keep trying.
  3. Thanks for your reply. I have tried this earlier, and it doesn't seem to work.
  4. hey Simio insiders, I am experiencing a problem using rate tables. I want to utilize rate tables to generate a non-stationairy poisson process. I have generated a table with values for 21 hours and the last three hours should be 0. I thought i could either use a rate table with 24 intervals with the last 3 intervals given a value of 0 arrivals. Or i can set a stopping condition at 21 hours. I have set the start time of my simulation at 07:00 (due to worker schedules). I am experiencing the following problems. The rate table seems not to generate the right values at the right times. (i have tried both setting the 0700 values at 0000 and 0700 in the rate table). The rate table does not stop after generating 21 hours of arrivals. In my eventual experiments i want to use 2 different rate tables (using different sources) that I scale to vary arrivals in a specif way. It is quite important that I understand how I can make this work. Do any of you know how I can fix this?
  5. Hey, Thank you for your reply. I have fixed the problem! It was a process that I forgot to stop after a WAIT step. Stupid mistake, but it happens. Thanks
  6. Hey, Thanks for your reply. No I have not used a move or size step, I use the worker as a resource. I use it for processing, and have a resource seize and release before processing.
  7. Hey Simio insiders, I have been working on a model with workers. The workers transport goods over a facility, from one server to another. They seem to work perfectly until about 2 hours into the simulation. I have been looking into the the 'watch' properties, and it appears that the worker is waiting for something. This happens eventough i do not have a wait process in place. It waits at a server which it is about to drop an entity. The server input buffer is infinity, since i thought it might have caused the problem. Do any of you know why my worker is waiting?
  8. Yes that's fair, especially since my inbutbuffer has a capacity of 1. This works, thank you so much!!
  9. Hey, I've got a quick question on how to route to a combiner with the longest waiting time in their parent queue. I think it should be quite easy, but i cant seem to make it work. What i have been doing is setting the selection goal of my routing node to largest value, and select from a list. This largest value I think should be the the longest waiting time in the contents of the parentinput queue. I have tried this multiple ways both using assosiated object and without. When i recall the number waiting it seems to work, but with recalling the waiting time i'm doing something wrong. My current expression is: Candidate.Node.AssociatedObject.Combiner.ParentInputBuffer.Contents.TimeWaiting(ModelEntity) or Candidate.Combiner.ParentInputBuffer.Contents.TimeWaiting( object ) both seem to work for content.numberwaiting. I think i am describing the ( object ) part wrong but cant find how i should write for the modelentity otherwise. I have tried to recall a specific entititype like so --> TimeWaiting(Truck) this also does not work. Does somebody know how i can acces the ParentInputBuffer.Contents.TimeWaiting? Greeting Piet
  10. So I have tried doing this, but i can't quite get the workers to pick up the right trolleys. The capacity of the worker is too big and it will pick up more than the batch sometimes. In the logic i tried to use 'search', but can't quite seem to find the right expression. Any ideas?
  11. Hello, I'm working on a problem where at some point a worker will transport a specific amount of pallets. Whereafter these pallets are processed by a server and a server wil process them. Once processed, a different worker (or the same worker) will move the pallets to the next server. How do I save these entities as a batch and let workers know how much pallets they can process? At the moment I have two approaches. One where I create a 'batch' as an entity and assign to it the amount of pallets. The 'problem' in that case is that I do need to count the amount of pallets at a server, since it has a certain capacity. And sometimes an initial batch whitch comes from a truck needs to be split to fit the capacity of workers. But once this would be fixed, the worker will always transport the right amount of pallets. A second approach that I have tried is to create the pallet entities normally, and assign a 'PalletHistory' in the modelEntity properties, but I find that after processing I can't find this palletHistory for the workers to get a sign of how many pallets to transport. Do any of you guys have an idea how I can approach this? Greetings
  12. Great, thank you! My current problem is that workers should carry a specific amount, so sometimes 14 sometimes 17 with a max of 30. This maximum is given at the transport logic I think. Do you have a suggestion on how to deal with the specific numbers (depending on the amount of pallets in a given truck)?
  13. Hey Simio insiders, I'm a Simio beginner and am doing my first big Simio project. I am modelling a docking system. Trucks arrive at docks with a certain amount of pallets/trolleys. The trucks dock and after a worker inspects their shipment, the trolleys or pallets will be transporter by the worker to the next area. Since there are multiple trolleys in a truck the worker will first transport the exact amount of trolleys (more than 1) to the next area. I cant find how to increase the capacity of a single worker and how to assign a precise amount of trolleys (temporarily) to process/transport. Thank you for your help
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