Linked node waiting spot queue

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question

MPeyman asked Jan 08 2024 at 4:31 PM MPeyman commented Jan 28 2024 at 7:52 PM

Linked node waiting spot queue

Hi Dear All,

In the attached model, I want to consider that some nodes are link to each other for example the nodes of Queue 2 and 3 are linked together also nodes of Queue 7 and 8 are linked. so if vehicle1 take row 1 and goes to one of the Queue2 or 3 then if vehicle2 visited the queue1 and wants to visit queue 2 or 3, since vehicle 1 is still in the linked node should wait in one node like NN13 until vehicle1 get out of this link nodes, the same for the queue7 and 8 ( the NN13 is designed as a waiting spot). so the travel time of vehicle 2 might increased due to the delay. (I dont prefer to use the UseMaxWaitTimer option ) if it is the only option please let me know.

Thanks in advance.

peyman-flex-model_original.fsm

Software Version:

FlexSim 23.0.8

queue linked node waiting spot

peyman-flex-model-original.fsm (64.5 KiB)

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Answer 1 · 2024-01-09T22:05:18Z

Jeanette F answered Jan 09 2024 at 10:05 PM MPeyman commented Jan 28 2024 at 7:52 PM

Hello @MPeyman,

Your Zone needed to be set to Global rather than Local. Since your Zone is being used in object process flows each object attached to the flow is an instance of the process flow. If you want the zone to work for both at the same time set it to Global rather than the zone working for each task executer separately.

With the Zone set to Global the task executers will not travel to the same destination while another is at it.

peyman-flex-model-original_1.fsm

1704837889402.png (30.8 KiB)

peyman-flex-model-original-1.fsm (64.3 KiB)

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MPeyman commented · Jan 11 2024 at 2:28 PM

Hi @Jeanette F , Thank you for your answer. Now in the model if they have to visit same queue one of them will wait until the other finish his visit. but they wait if the node is the same. But, the things that I want to consider is a bit different lets explain in this way:

There are at least two operators (or vehicles), each with a set of tasks represented by nodes they need to visit in a specific sequence. For example, Operator 1 needs to visit nodes in the order 8-3-4-5-6, and Operator 2 needs to visit nodes in the order 4-2-6-3-5.

Some nodes are 'linked'. If an operator is visiting a linked node, the other operator cannot visit the other node in the linked pair. For instance, if nodes 2 and 3 are linked, and Operator 1 is at node 3, then Operator 2 cannot visit node 2. So, an operator must wait if their next node is either occupied by another operator or is part of a linked pair where the linked node is currently being visited by another operator. So it should wait on previous node or in the node between them.

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Jeanette F ♦♦ MPeyman commented · Jan 11 2024 at 10:08 PM

Then the partitions for the Zone need to based on this grouping instead of individual zones.

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MPeyman Jeanette F ♦♦ commented · Jan 17 2024 at 9:19 AM

dear @Jeanette F, should I put the queues in different groups and then in Zone properties> more properties> partitions> partitions by, selecting the multiple groups that I created?

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MPeyman commented · Jan 22 2024 at 5:54 PM

Dear @Jason Lightfoot , for the first part I did this:

For the second one I didn't fully understand it

Also I did the script and the last step I did this:

can you please let me know how the second one works? also how I would know which nodes are linked together?

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zonepartition.png (48.7 KiB)

lable-zonepartition.png (66.7 KiB)

Jason Lightfoot ♦♦ MPeyman commented · Jan 22 2024 at 6:16 PM

You needed to add a pointer label here to a linked queue. Use the sampler to point it to another object.

For those queues that are linked, delete the zone label that the script created (or revert to a version before you ran the script).

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1705947193508.png (6.7 KiB)

MPeyman Jason Lightfoot ♦♦ commented · Jan 23 2024 at 11:41 AM

I did the modification but now when I compare the time, there is no difference between previous model and current. I set to see the same node.flex-model-original-modified3.fsm

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flex-model-original-modified3.fsm (64.2 KiB)

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