topic Re: Pull flow simulation in FlexSim Forum

Pull flow simulation

s_jaubertREVKG — Mon, 11 Nov 2024 17:03:59 GMT

[ FlexSim 24.2.2 ]

Here is a pull flow model.

The processor consumes items that are in bins that are initially in the processor's work in progress inventory.

When a bin is empty, an operator goes to get it and must place it in the empty bin rack. Then the operator goes to get a full bin in the inventory. Until the bins are exhausted.

What I can't understand is why the operator sometimes moves with an empty bin when he goes to get a full bin.

In the settings, if I increase the number of operators, this does not happen. Could this be due to a priority or synchronization problem??

Thanks in advance

Re: Pull flow simulation

s_jaubertREVKG — Mon, 11 Nov 2024 17:05:14 GMT

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Re: Pull flow simulation

allister_wilson — Mon, 18 Nov 2024 08:57:10 GMT

In the second half of your process, when transporting the full bin to the processor, you currently have this setup:

The item label is set to an array containing all the items inside the bin.
The operator then unloads these items into the queue, not the bin itself.

I expect what you wanted was for the operator to unload the full bin to the queue instead, which would look like this in your model :

The reason it can still sometimes work is because when the queue is empty, the operator will "Load" the bin they are already carrying again, without said bin ever actually entering the queue.

Re: Pull flow simulation

logan_gold — Mon, 02 Dec 2024 17:12:42 GMT

Hi @Stéphane Jaubert, was Allister Wilson's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always comment back to reopen your question.

Re: Pull flow simulation

s_jaubertREVKG — Tue, 03 Dec 2024 06:33:34 GMT

Thank you, I understand better