Search the Community

Hello everyone, I have a simple production line of 15 servers, some combiners, nothing too complicated. I need to somehow setup the input buffer at each server to have 1 entity at the start of the simulation and then run it. Or having filled servers with 1 entity at each server. Could anyone please help me and show me how to set it up? I need to start counting the stats once all the workstations are filled, but warmup period does not seem to work for that case, because it destroys the enitities at the servers and starts over. The filled-input-buffer-way looked to me like the easiest solution. But if there is another way, please let me know. Thank you!

My simulation is looking at maintaining inventory levels at multiple servers across a road network. Inventory is delivered via transports and is processed at each station at a rate of 1 item per hour (constant). What I am trying to do is to run some experiments to determine effects of different parameters on delivery system performance (ability to maintain inventory at (between 0-12) at each server location for the duration (72 hours is the current short test case). I have my responses set up to report Input@Server1.AssociatedStationLoad however the numbers are being listed between 0 and 1 instead of 0 and 12. Additionally, in the experiment output I get a 1 or 0 per server per scenario iteration. What I need to see is if any (and what) server hits 0 at any given time by having an output give an inventory level at current time for the duration of each run. Any advice?

I'm having some trouble with worker actions and transfer steps. Below is a picture of my current model. I have also attached the simio file itself. What I want to happen: Worker1 carries both entities to their respective nodes and leaves them in their respective stations after worker(A/B) "checks them" (I used a delay to simulate this check) and then Worker1 moves on. The worker(A/B) only picks up the entity if needed. So if the worker was with another entity in process (like Srv(A/B)), he would go check the new entity so that worker1 can move on, but would return to finish out the first entity to the end. My problem: Worker1 doesn't wait for the other workers to check and move on, just puts in station and moves on. I can suspend and resume the processes and get the worker to the (A/B)PICK nodes, but the worker picks the new entity up and starts that. The entity they were working on before just vanishes or something. Then everything becomes a standstill. Lastly, I run into this transfer error so much, and can never figure out exactly what causes it. ModelForQuestionCOPY2.spfx

Hi I need reference to some sort of property that can help me store entities in my transfer node(shelf). I have used the Park property but then I am not sure on how I can release it when the transporter is told to arrive at the transfer node(shelf) to pick up certain of those parked entities. Any help is appreciated. Thank you

Hello, I'm college student preparing the contest sponsored by "KOREA SOCIETY FOR SIMULATION". So I'm making model which has no input buffer , just remaining on the path. But the issue is that, if i set the input buffer as 0, the source makes entities only two, which is the sum of the sever's capacity.... I have seen that kind of model at the jsmith.co , but my model doesn't act like that.. What should I do for my model? isThereInputBufferCapa.spfx

I have entity1 and entity2 entering a server. I want entity1 to have priority over entity2 when in the input buffer waiting to be processed no matter how many entities are already in the input buffer. I'm using connectors leading the entities into the server input node. Any suggestions?

Hi all, in my model I have a specific transfer node where a worker transfers an entity to a vehicle. I cant add the load unloading times in the worker or vehicle due to the fact that there is only loading time in this transfer point exactly. I was wondering if there is a way to directly add a "processing time" to this transfer point. Maybe by creating a subclass? Thanks

Hello, I'm modeling an orange factory. One thing that I'm trying to solve is the modeling of the reception pools (of oranges). 1) Arrive trucks. 2) The truck is weight. Every truck have a random value of kilograms of oranges. (integer) 3) The truck dispose the oranges in a workstation. (workstation = reception pool). This is model with a Separator. 3.1) There are 3 workstation. 3.2) Every workstation has diferent Input Buffers. 3.3) The entity once entered in MemberOut@Separator1, it triggers a decide process. 3.3.1) This decide is to choose the workstation depending of the Quantity of Oranges versus the Input Buffer. Now I need to Wait until the Input Buffer is Empty, but I'm having problems with that, because the entities don't release from this server. If there are doubts about the model or anything else, I will answer as fast as possible. test1.spfx

Hi All, Used simio a couple of years back and in the process of trying to refresh my skills. I am trying to model a synchronous transfer model in a manufacturing setup. Synchronous meaning - entities will only transfer downstream only after all the entities are processed in their respective servers. Any ideas on which tools to use is highly appreciated. Running a bit tight on time. Thanks all

I have two models in a project, one which handles supply (results in trucks being routed to one of several sinks) and one which handles demand (various sources). I would like to connect the sink of my supply model to the source of the demand model. Can I transfer entities between models? Or do I need to manually copy and paste each object from one of my models into the other to allow for the transfer of entities? This may be very simple, sorry if I'm the annoying newbie! Joy

I’m representing an empty container deposit, where the containers are stored in different blocks. Gate in trucks arrives to the deposit loaded with containers that have to be unloaded by cranes and stored in the container blocks. In addition, there are gate out trucks that arrive to the deposit to retrieve containers. In the model, the containers are represented as entities, so as the trucks. I use Stations to represent the blocks that store the containers. To understand the logic of container arrival, we have to notice that next to the Station there is a Transfer Node, and when a container enters the Node (through a Transfer step in a Process), is transferred to the Station. To understand the logic of container retrieval, we have to notice that there is a Combiner next to the Station, and when the truck enters the Parent Input Combiner Node, a Process is triggered that searches for the container in the corresponding Station, and then it to the Member Input Combiner. Given that there is one Station for one block of containers, a single Station is used for the arrival and the retrieval of containers. The problem that I have is that in certain occasions, when a container is going to enter a Station, an error occurs and Simio shows this message: “The entity location is in transition state “WaintingToTransferIntoStation” and a new transfer request is invalid”. I don’t understand why this happens, given that in the Node that triggers the Process that executes the Transfer, only a single container enters at a time. Any help is greatly appreciated! Release: 8.136.13569 Model is attached. https://dl.dropboxusercontent.com/u/41163946/ModelPlacillaNewV3.spfx

Hello Simio Forum. I’m just starting a model which, for me, is a little unique as I have only used servers in a task capacity through steps. The new liquid ink model consists of 4 lines with each line made up of 3 steps each having a volume of 3.5 tonnes. 1. PreMix 2. Mill with a recirc tank 3. PostBlend I do not seem to be able to model this using servers because I cannot represent the transfer time of product occupancy between steps. I need this to show utilisation/uptime of the steps. But when I look at using "Flow" tanks I cant add the process tasks the same as servers (rows) i.e. gather weigh, milling time, QC etc.. Plus will need to add/link worker steps. Is there a middle ground between servers & tanks? Thanks Martin

Hello All, I'm trying to create a model that will keep track of processing time for each transaction processed and reroute transactions that exceed a processing time threshold to an alternate sink. Initially, I attempted to rework the "Remove from Allocation Queue" Simbit, but the "Remove" process only seems to work with queues. The model itself is very simple. Single source with a random exponential inter-arrival time, single processor with capacity of 50 and 2 sinks; one for completed transactions and one for long running transactions which are manually routed. Any guidance you can provide would be greatly appreciated. Thank you, Ryan

I'm addressing a Multi Product Multi Routing situation. What's the best way to model a buffer without using the Server or WorkStation blocks? N machines are connected to M machines producing different products with alternative routing. Therefore, having a common buffer where entities coming from different machines could wait for the first available machine in any alternative route is very important. My question is whether this would perform better with stations or storages (or any other object in Simio). I intend to experiment on Buffer size to optimize space requirements. This would be done using experiments hence the chosen object/method needs to be suitable for that. Scheme: [n1] ___________ [m1] [n2] | | [m2] [n3] | Buffer | . . |___________| . . [M ] [N ] Thank you in advance

Hello, I want to bring a box in front of two server. I want the units in the box to be the entity for the two servers. How can I do that ???

I constructed a simple model with a single server where I used a rate table for arrivals. The server block capacity was fixed at 2. When I run this model by hand, I see that maximum holding time for the input buffer of the server is just about 24 minutes every time (but the same exact number), just as it would be if the arrival rate was constant throughout a 24-hour period. However, when I run an experiment where I defined the Server1.InputBuffer.Contents.MaximumTimeWaiting as the response variable, the result is 40 minutes for the scenario where the server capacity of 2 is 40 minutes.(I am using version 5.91) I am wondering 1) if I am confusing two different quantities (maybe the maximum holding time result is averaged by dividing by capacity, but that would be a bug, because the capacity should have no effect on the input buffer) or 2) if the randomization seed is the same for every run that I do by hand, which must be the case, because when I reduce the required replication count to 1 for the experiment, I get the same exact result for the single run that I do by hand. If that is the true reason, then I must ask where to change the randomization seed for every run.

Is there any way to clear output buffer of source at particular time of simulation (like every 165 th hour and its multiple)

Hello, I hope everybody is doing great! So I am trying to simulate a system that have different servers with different selection rules, all the customers wait in the same waiting area/queue. What I want is that all servers search in a global Input Buffer Queue (or Storage Queue) every time they are available and choose the entity based on their selection rule, or a process that send the entities to the their right destination whenever a server that can process them is available. I have attached a sample model less complicated than my system for what I want with further description of the objects, but it doesn't run properly at all, it is just for clarification. The first challenge is that I want the selection rules of the servers to choose from the global input buffer not the input buffer queue of their own, I am not sure how to do that or if it is applicable. The second challenge is that some servers have complicated selection rules (as shown in the sample model) I was able to represent these rules in a separate model by holding the entities at a node until the condition is met, but when I have multiple servers in some cases these entities can go to another server, so the rules conflicts with each others (unless we were able to integrate both rules together). Also, having multiple stations or storage queues with different ranking rules for each server do not work because when the entity enters the queue it will get stuck there even if another server was available and able to serve it. If you believe there is another way to represent the system with Simio I would appreciate your suggestions. Thank you for your time GlobalQueue.spfx

Hi, i have version 5.9, and for some reason my input buffer, output buffer and processing lines go away or are hidden. when i say lines i'm referring to when you bring in a server it automoatically has the output buffer line that you can move around, etc. is there a way to turn this on and off? maybe i turned them off somehow. or maybe it's hidden under the floor plan i imported? anyway for me to bring those lines up to front if they are indeed under the floor plan? any help is greatly appreciated, thanks!

This is a very simple question that is common to many models. Let's imagine I just want an element where entities will be stored untill some other element 'pulls' from them. What is the easiest way to imlement having rich information on the amount of entities stored in that element, their average throughput time, etc? Many thanks.

Hi! I have this: Configurations are like: Then I have the station's contents being displayed in the External definitions. I can count the new entities entering the station.contents, but they don't visually appear in the queue... What am I doing wrong? Thanks!

Ever have a rectangular box moving short edge first on one conveyor and then connect at a 90 degree angle to another conveyor on which you want it to ride long edge first. This rather flexible object will do that in any orientation. And has a few extra options as well. Part of the "trick" is to have two pictures of the same object oriented off by 90 degrees. Use this as is or as a basis for your own customized object. (Requires sprint 68 or later) Someday this may involve into a SimBit with a full explanation, but in the interim, enjoy. TransferDeviceSimBit.zip