question

Ludovic S2 avatar image
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Ludovic S2 asked Ludovic S2 edited

How to move batches from a queue in a specific order to different racks

move-batch-to-alternate-racks.fsm

Hi everyone,

In the attachment I added a model on which I have been working. Each time one of the racks reaches a certain level (1280) it triggers the creation of a batch (1260 untis). The thing I want the model to do is to move the batches from queue 2 to the racks in an alternating way. So the first batch of 1260 units to rack 1. The second batch to rack 2. The third to rack 3. The fourth back to rack 1 and so on.

Is there anyone who would be able to help me with this ?

Thank you in advance

Kind regards

Ludovic

FlexSim 19.0.0
batch processing
move-batch-to-alternate-racks.fsm (171.8 KiB)
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Ludovic S2 avatar image Ludovic S2 commented ·

Currently the model also divides the batches accross multiple racks, which is something I also want to avoid.

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1 Answer

Jeff Nordgren avatar image
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Jeff Nordgren answered Ludovic S2 edited

@Ludovic S2,

Attached is your model with the changes that I've made. I made one change that seemed logical to me. That is, because the processors after the racks process flowitems at different time lengths, Rack1 does not always empty first with Rack2 second and Rack3 third. So what I did was to fill the rack that initialed the refill action (a level of 1280) rather than just fill Rack1, Rack2 and Rack3 in that order. I'm not sure if this is what you were after but like I said, it made more sense to me. If that isn't what you want, you should be able to adapt the model to fit your needs.

I added triggers and a label to Processor3. Added Flow control to Queue2 and added a trigger to each of the racks. If you have any questions or problems, please let us know.

Thanks.

move-batch-to-alternate-racks-jn1.fsm


move-batch-to-alternate-racks-jn1.fsm (27.4 KiB)
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Ludovic S2 avatar image Ludovic S2 commented ·

Hi Jeff,

First of all thank you for taking the time to look into my model.

This is actually exactly how I want it to work. But because of my limited knowledge I tried working with closing and opening the ports at these moments in the hope it would somewhat create the same effect.

Thank you very much

Kind regards

Ludovic

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Ludovic S2 avatar image Ludovic S2 commented ·

model-without-variation.fsm

model-with-variation-in-demand.fsm

Hi Jeff,

I am having some issues with the model. I tried to extend it to 10 racks. I also let the processors that represent the demand (behind the racks) follow a poisson distribution.

Without the poisson distribution the model still worked correctly. But when I added the poisson distribution many of the racks just don't receive a replenishment anymore and end up on 0 inventory. Would you know why this is the case ?

Thank you in advance

Kind regards

Ludovic

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model-without-variation.fsm (33.8 KiB)
model-with-variation-in-demand.fsm (35.4 KiB)