I’m working with a AnyLogic simulation on emergency department. The departments leader want to test the benefits of adding, nurses, treatments room etc. It was easy to make it so that they can dynamically change the number of nurses through the GUI, as this is a "Moving" resource type. However, how can I dynamically change a Static resource type like ED-rooms which is tied to specific Network Nodes?
It's not that I want the resource pools to be dynamically created. But it's that I want to control how big of a portion of the existing resource pool that will be used. The current capacity is 13 rooms, and I want this to be varied from 13 to 28
Using get_Capacity(n) works for non-static resources such as Nurses etc. but when I use .set_Capacity(n) for a Static Resource I get the following error:
"(ECRoom is here referring to rooms in the emergency department): java.lang.RuntimeException: root.ECRoom: Capacity definition type should be 'Direct' to support this operation"
The easiest way is to just pre-define several ResourcePool elements with static ED rooms linked to whatever node they would be using.
Then, set their normal capacity to zero and only change it to some non-zero value if the user wants it.
If you simply need to change the capacity at runtime, myResourcePool.set_Capacity(someNumber) is your friend :)
(Dynamically creating resource pools, home nodes, etc. is all possible but a whole different ball-game)
Related
I would like the capacity of a resource pool to go from 2 to 1 at a specific point in time. As of now, I am using an event to trigger a reduction in a variable. This variable is what I use to define as the resource pool capacity so logically I would think that the resource pool capacity would drop as well. However, when the event triggers, the variable reduces but the resource pool capacity does not, even if the resources are idle and have no tasks.
Resource Pool capacity is not dynamic, so if you set it as a variable, the variable will only be accessed on model start-up. Changing the variable value during model runtime will not make a difference.
To change the capacity you need to use:
resourcePool.set_capacity(value);
Replace value with the variable name you are using.
For your information, fields preceded by an equal sign are static while those preceded with a circular arrow are dynamic. The example below shows both:
I'm simulating a manufacturing process. The stations need a variable number of ResourcePool "workers". Let's say there are 5 workers for 4 stations, and I want to simulate that those workers can work indifferently in any of the stations.
The problem is that they are not working in the closest station. Oppositely, even when a worker is next to the station, maybe the furthest worker goes until this station which needs the resource, and then the process starts. Obviously, this is inefficient and doesn't represent the reality.
I already have the workers defined, their shifts, their timetables, etc. I have tried to use the function getNeartestAgent() in 'Customize request choice', but it doesn't work. I also tried to calculate the distance of each agent with getDistance(), but I don't know how to manage it and I'm sure it must be a simpler solution even when I'm not working on GIS.
[31/08/22]
Recently I tried to develop a similar model, and I still have the same problem. The model consists of 3 stations which need 1 unit of ResourcePool. In this pool, there are 2 units. This units are agent type Operario. So, I need to choose the closest unit to the station. I tried several things, the following are just some...:
Service blocks -> Resource selection -> "Nearest to the agent". The agent is the material item, so the unit should go to the closest agent being treated in the station. However, it didn't work (units where to any station indeferently).
Service blocks -> Resource selection -> "Unit with top rating". The Unit rating field was 1/distanceTo(node1.getXYZ()). It didn't work either.
Stations (instead of Service blocks) -> Customize resource choice -> Resource choice condition. I can't stablish a boolean variable related to the unit position, as I can't compare among them.
Function. I can't compare units from ResourcePool, as they are detected as Agent and not as Operario.
ResourcePool. I tried to stablish the priority based on the distance to a certain node. But then I can't call these agents (Operario) from the station. It seems here I can only refer to material items, eventhough I write "unit.(...)".
Does anyone know how can I choose the closest resource to the station in which the task is performed? Should be through Customize resource choice -> Resource choice condition, but I don't know how!
when you use a service or seize block, in the advanced properties, there's an option called "Resource Selection"
You have to choose "Nearest to the agent"
If this doesn't work, it might mean that a resource that is close by and not selected, might be actually busy with something else... you have debug your model in order to be sure that it is not the case.
I am trying to use anylogic to model labor shortage in production. I have the workers set as a resource pool with the capacity defined using shift plan, defining the number of workers by different shift. I am trying to include a event module that changes labor capacity for each shift during the middle of simulation. However, anylogic showed me an error saying I cannot change shift group size dynamically. Is there any workaround to allow this to happen? Thank you.
You can recreate the schedule within an event each time you need to perform a change.
AnyLogic's API explains this quite well, see https://help.anylogic.com/index.jsp?topic=%2Fcom.anylogic.help%2Fhtml%2Fdata%2FSchedule_API.html (sample model or 'creating and initializing schedule programmatically on model startup')
I am currently modelling the entire production process of a company with limited human resources.
Part of the model is visualized here:
The Model: In the example there are multiple blocks but the focus for me is on the resource using blocks. The assemblers use 2 resources, the service, seize and rackstore blocks use 1 resource each. As you can imagine they are all fully utilized as I only have a resourcepool of 6 people (and there are more processes beyond this)
Question: Because of this full utilization my entire process is blocked because there are no free resources. Therefore I would like to ask if it would be possible for me to limit e.g. the blue part of the example flow to 3 employees using the same resourcepool? That way I can set priorities between the processes and make the process work again.
Use hold blocks to stop products to flow if the used resources are equal to 3
The code:
On enter delay (when the resource is seized)
resourcesInAssembler++;
if(resourcesInAssembler==3){
hold2.block();
hold1.block();
hold.block();
}
On exit (when the resource is released)
resourcesInAssembler--;
hold.unblock();
hold1.unblock();
hold2.unblock();
I am using Anylogic where I have just one ResourcePool made by just one Resource Type unit (created through the command "Resource Agent" in the Process Library).
I define the capacity of the ResourcePool, let's say, to 20 and I would like to have each of the single element (or some of them) within the Pool with a different value for the same parameter (e.g 3 units have parameter=1 , other 4 units parameter=2 ...).
First of all how can I set individually each of this parameter? Do I need to use a population of agent? If yes how can I do that? And how can I call the resourcePoolPopulation in other location within the model?
Is there a clevere way to do that?
Hope it is clear, thanks!
That is a weak spot of resource pools, IMO. They are designed to hold a homogeneous "soup" of similar resources and it is hard to pull in a specific element.
However, not impossible, there are various ways. You can create your resource agents manually in an agent population first and add them to the pool manually after creation. Then, in the service object, tick "manual resource unit choice" (or similar) and use a criteria that matches your resource params.