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Everything posted by g1h2j3

  1. Thank you very much dsturrock. Hmm so i tried it out and yes that is a problem. Because sometimes the vehicles are not idle between the tours, They directly pick up new entities and go for the next delivery tour, so there is no change of state and therefore not in the statistics. I use a state now to measure the amount of vehicles going through a node. Thank you very much!
  2. Hi Omar, check out the model i add in the attachment. I had a similar problem. Maybe this example helps you.There the vehicle picks up the entities with the highest priority first and assign the priorities depend on the waiting time of the entity. Why you choose smallest value first when you want to get the priorities with the highest priority first? I think you might you use the "dwell until" function of the vehicle to achieve your goal. Like dwell till the queue at the transfer node is empty. I hope this helps. Greetings Model_Heuristic_Poisson_B2_B1_B6_100.spfx
  3. Hi willem, thanks a lot. So I tried now several runs and models and there is always a small deviation but really not big, so its ok. But still kind of strange. Your method is much easier to implement so i will use it for sure. Thanks!!
  4. Thank you very much for your answers. Jizhou, thank you for the info. I just joined the group, yes i study in China right now. 对,我刚才住在北京。我是留学生的清华大学。我学习工业工程。我中文不好。 dsturrock, thank you for the answer. That is what i want. I was searching in the default statistics already but was not 100% sure if occurrences is really the amount of trips. Thanks!
  5. I have a model with several vehicles transporting different amount of entities. I would like to know the average amount of entities a vehicle transports during one tour. So there is only one TransferNode where the vehicles can load the entities and then they start to their tour and come back to the TransferNode. The best way would be to know the amount of entities a vehicles loads on average on this TransferNode.I need the average value for each vehicle measured over the whole simulation run. But i have no idea how to do that. I would appreciate any suggestions. Thank you very much.
  6. Hi willem, thanks a lot! Can i ask you why the process is OnRunEnding? Or is that necessary to record it during the simulation? Would it work when i initialize it in the beginning? I did the experiments and i get slightly different values. But they should be the same right? Or can there be a deviation? Thank you very much again! I appreciate your time!
  7. Hi willem, thanks! I tried again and it still doesn't really work . I attached the model where i implemented it so far what you suggested. Maybe you can have a look and just change as you would do it. Thanks you very much. I am curious now how you do this. Example_TotalIdleTimeAllServers.spfx
  8. Hi willem, thank you very much again for your answer. I am not getting it,sorry . So i implemented an ObjectList. So far so good. Then i should create a process, which is initialized in the beginning right? This process has first a search step which searches through my object list. I leave Match and Search condition empty? I am not so familiar with the search step. I can search for the idle servers but then i need to enter the expression again -.-. I fear you need to explain it to me in more detail. I don't see the solution. Sorry for that.
  9. As a response value for my experiments i want the total idle time of all servers during the experiment. But i have around 100 servers and don't want to type for every server a expression like "Server6.ResourceState.TotalTime( 0 )" and sum them up. Is there an easier way? I would like to use only one expression which gives my the idle time of all servers. Something like All_servers.ResourceState.TotalTime(0).
  10. Hi willem, thanks for the fast reply. Yes that's what i wanted!! Ah still not very familiar with this. Takes some time. Anyhow thanks a lot!
  11. Hi willem, thank you very much thats a great solution.I like it very much. But i also wanted to use it to assign a new capacity value with Vehicle.currentcapacity but then i get a failure message. I attached the failure message. Do you know why? Why that works for the vehicle speed but not for the capacity? Thank you very much!
  12. Hello, i want to change the speed of a vehicle short time after the simulation starts. Because at the beginning of the simulation the desired speed of the vehicle is very high to get some inventory to the servers. Then i want to reduce the speed of the vehicle to a normal speed of 0.8 m/s. So i used an assign step after 3 minutes with the state variable "Vehicle1[1].DesiredSpeed", new value 0.8. Thats works fine for one vehicle. But if i change the population of the vehicle to more than one, then all vehicles except the first one keep the initial speed. What state variable should i use
  13. Can you share your model? Its hard to see something in the picture.
  14. Nobody any idea? I am still struggeling with that.
  15. I extended the previous model a little bit because i want to measure how often the servers are idle. I implemented that the following way: As soon as one server is idle it fires an event and all the other servers are idle too. Is one server idle, all servers have to stop working. Because you can consider it as an assembly line. And i count how often the event is fired. All servers fire the same failure event. But i don't know how to repair the servers as soon as the idle server gets a new entity again. Because as soon as the idle server has new material the assembly line (all servers)
  16. Hi willem, thank you very much for your reply and your solution. I didn't know that i can enter for the assign step and the state variable an own expression. Because of the drop down menu i was thinking that i can only select from that. What why i was so confused and couldn't do anything with your expression. Thanks a lot for your help and effort!
  17. Hi willem, thanks for your reply. I tried that but doesn't work. I attached the model already, in the posts before. I attached it again just to be sure. HeuristicTest1.spfx
  18. Please anybody knows how to do that? I think that should be a very common problem to change the vehicle properties after simulation start.
  19. Basically i need to know hot to change the capacity of the vehicle during the simulation. I think the right expression would be something like this: "Vehicle.RideStation.CurrentCapacity==4". But how to assign/implement that?
  20. You want the number of rows in your table or the specific value in a row? If the specific value use that expressions: TableName[RowNumber].ColumnName or TableName[RowNumber, ColumnNumber] Number of rows, i don't know.
  21. Dear Dave, thank you very much. I didn't know how to use the ModelTrace. Also i thought the dwell time is only for loading not for unloading. Thank you very much. I spend some more time with my second problem, that i want to monitor how often the server are idle. Therfore i thought the vehicle should deliver to each server two entities in the first tour, like two containers for each station. So after the first tour i wanted to change the capacity, the speed and the loading time of the vehicle to get my normal settings of the simulation. To do this i used an OnRunInitialized Process wh
  22. Hello, i have some problems with my model and i really hope you can help me with that. I don't think it is too difficult but i don't know how to solve that. Please take a look at the attached model. So the goal of my attached model is that vehicles transport entities to the servers. The vehicles should wait till they are fully loaded with 4 entities but they are not allowed to have a length which is more than 12 meters. Each entity has a certain length. Every server has a random distributed processing time. As soon as the entity exits the server, a new entity is created. The vehicl
  23. Hi willem, thanks for your reply. That was what i searched!
  24. I want to monitor the time a server is idle as a response feature in an experiment. I think the standard Pivot Grid statistics has the "Time Starved" feature which tells me how long the server is idle. But i want the total idle time of all servers as a response in my experiment. So thought i may use a tally statistic with the value "Server1.Processing.Contents==0" but i don't know how to connect that with a property and i am not so sure if that is correct. I think that might be a common interest so maybe you have a solution for that.
  25. I got a solution of how to mix two type of entities randomly with the help of a container entity ( so one entity serves as a container for the other entities). For anybody who might be interested, i attached the model. But if it comes to 4 different entities i am not sure. The attached model has two examples and you may also have a look at the example with the 4 entities please. Maybe you can help me with that. The example for 2 entities should be right. But the container entity is not a perfect solution in my opinion. Batching_4TypesEntities.spfx
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