Dynamic queue Maxcontent

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Ilenia asked Dec 07 2024 at 12:48 PM Ilenia commented Dec 12 2024 at 3:07 PM

Dynamic queue Maxcontent

I would like to make the MaxContent of a queue variable. I have two queues: one feeding into a processor and another one receiving items from it. I want the total number of items in both queues combined to always be a maximum of 10. How can I achieve this? Thank you!

Software Version:

FlexSim 24.2.1

queue dynamic maxcontent

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Answer 1 · 2024-12-09T17:12:56Z

Sebastián Cañas answered Dec 09 2024 at 5:12 PM Ilenia commented Dec 12 2024 at 3:07 PM

Hey @Ilenia,

The easiest way that comes to my mind is using a Process Flow Zone. You add both Queues to a Group and you add the tokens to a Zone whenever an item enters or exits the Queues. You set the maximum quantity of the Zone as 10.

I attached a demo model: DynamicQueueContent-sc.fsm

1733764356963.png (65.3 KiB)

dynamicqueuecontent-sc.fsm (36.8 KiB)

· 5

Ilenia commented · Dec 10 2024 at 10:40 AM

Thank you very much! However, more than 10 boxes still enter the two queues!

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Sebastián Cañas Ilenia commented · Dec 10 2024 at 2:45 PM

@Ilenia ,

You're right! That solution would've worked using process flow when moving items. I attached a model using a different approach: I create a label in the processor that count the current content of both queues and the processor. Then, there is a logic in the first queue that closes the input port when that value reaches 10, and open it when it below that value.

The graphs of the label and the content between the queues shows that there are never than 10 items

DynamicQueueContent-sc.fsm

0 ·

1733841881577.png (169.6 KiB)

dynamicqueuecontent-sc.fsm (31.5 KiB)

Ilenia Sebastián Cañas commented · Dec 12 2024 at 2:17 PM

Thank you very much, now it works! Do you think it would be possible to have the boxes handled by 10 Task Executers, but each staying with the same box from the source to the sink? Or would I need to use objects other than queues?

Thanks in advance

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Answer 2 · 2024-12-10T10:39:59Z

Ilenia answered Dec 10 2024 at 10:39 AM

Thank you very much! However, more than 10 boxes still enter the two queues!

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