question

Stéphane Jaubert avatar image
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Stéphane Jaubert asked Allister Wilson answered

Pull flow simulation

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



FlexSim 24.2.2
pull from listpull flow
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1 Answer

Allister Wilson avatar image
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Allister Wilson answered

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

current.png

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 :

fixed.png

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.


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fixed.png (18.5 KiB)
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