How to send item to one of the empty queue in a group of queue?

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Ousmane asked Feb 21, '23 Ousmane commented Feb 24, '23

How to send item to one of the empty queue in a group of queue?

I have a model that simulates a supply arrival to a set of 3 queues. I want the model to send 10 pallets to the empty queues until there is nothing left to supply. and if there is no empty queue, supplies wait for a queue to empty. I put the queues in a group and limit their capacity to 10 so that it works but it doesn't work as I want because the queues exceed their capacity and there are no waiting line. in addition for the storage the trolley moves to another queue before returning to the queue where it must load the pallets. Someone can help me with this please ?

attached my model for more detail

Approvisionnement.fsm

Software Version:

FlexSim 23.0.2

queue empty queue supply

approvisionnement.fsm (83.0 KiB)

Answer 1 · 2023-02-21T13:46:02Z

Felix Möhlmann answered Feb 21, '23 Ousmane commented Feb 24, '23

You can have the queues on a list and have the token that creates the pallets pull a queue with content < 10 from that list.

If the content is still less than 10 after the pallet is moved there, the token pushes the queue back immediately, so others can pull it. Otherwise the token waits until the queue is empty.

approvisionnement-fm.fsm

1676987141261.png (33.2 KiB)

approvisionnement-fm.fsm (86.3 KiB)

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Ousmane commented · Feb 21, 2023 at 04:32 PM

Thank you, but my trolley still move to another queue before returning to the queue where it must load the pallets, do you know why?

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Felix Möhlmann Ousmane commented · Feb 21, 2023 at 04:57 PM

The transporter is moving the pallets in FIFO order.

First fill up one queue before moving items into the next. There are numerous ways to do this. For example instead of creating 35 tokens that each create one pallet, create 4 tokens that create 10 (or 5) pallets each and move them into a single queue.

You could also batch the tokens in the flow that controls the transporter into batches of ten based on the queue. Then move all ten items with a single token (utilizing subflow)

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Ousmane commented · Feb 21, 2023 at 05:41 PM

thank you, can you tell me more about the first example? the second, 5 tokens will be left beacause the batch is at 10

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Felix Möhlmann Ousmane commented · Feb 21, 2023 at 06:17 PM

Its the same principle: Have one token that acquires/pulls the queue, which then creates 10 pallets in it.

You could also set a max wait timer in the Batch activity to release a partial batch after X seconds even if there are fewer than 10 tokens.

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