Rack logic and assigning shelf placement and order

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John OR asked Feb 9, '20 John OR commented Feb 26, '20

Rack logic and assigning shelf placement and order

Hello,

I am trying to create a simulation of a warehouse where wooden pallets are placed on i-beam cantilever racks. My goal is to simulate our desired shelf-placement order (from top to bottom, newest at the top, oldest at the bottom) and also create an organization scheme for different types of wood on the racks.

At the moment I am stuck at trying to modify the sim's logic in where to place the items as they arrive in the queue from the source. I have a transporter assigned to the queue so that it will move the items to the drive-in rack. Where and how exactly can I modify the model so that the transporter places the newest items in a descending order, from top to bottom?

I'm currently following the pdf tutorial that comes with the student edition, but I am having trouble finding the answer to my problem within it. Any help anyone could offer would be greatly appreciated. Thanks.

Software Version:

FlexSim 20.0.2

rack storage transporters warehouse optimization model stock organization rack logic

Answer 1 · 2020-02-10T17:13:35Z

Clair A answered Feb 10, '20 John OR commented Feb 26, '20

Hi John,

Don't hesitate to attach your model, it can help us to better understand your question.

Please find attach a very basic sample model: 2020-02-10-rack-slot-assignment-strategy.fsm

new (red) pallets have a label "Type" = 1
old (green) pallets have a label "Type" = 2

Using Paint Slot Labels (https://docs.flexsim.com/en/20.0/Reference/3DObjects/Warehousing/PaintSlotLabels/), I painted all slots in the top level with the label "Type" = 1, and all slots in the bottom level with the label "Type" = 2.

Then the slot assignment strategy is to check if the slot Type label matches the pallet Type label:

I assume this sample model is very basic compared to your objective, but I hope it helps you to identify in which field you need to dig more.

capture.png (136.5 KiB)

capture2.png (12.7 KiB)

2020-02-10-rack-slot-assignment-strategy.fsm (67.9 KiB)

· 1

John OR commented · Feb 25, 2020 at 09:22 PM

Thank you very much for your helpful replies, they've helped me get a better grasp of the software! And yes, @Clair A that is pretty much exactly what I was going for, it was very handy having your model to compare mine with.

I'm a bit busy this week due to exams, but this weekend I will try to upload some progress shots of my model. Still having a few difficulties, but I'll add questions then. Thanks again!

0 ·

Answer 2 · 2020-02-09T21:58:47Z

Joerg Vogel answered Feb 9, '20 Joerg Vogel edited Feb 9, '20

Shelf assignment is called slot assignment.

Here are some answers you can start with:

Manual topics
warehousing

FlexScript class reference
Storage Object and following chapters

Warehousing demo model

If you have got a documentation or script for racks prior than FlexSim 19.2, you can forget just everything. Warehousing module has got a new structure of racks, functions like place in bay and place in level are missing.
You can assign a slot to an item anytime as long as the item is staying in the model and it hasn’t entered a slot. The last possible function is the slot assignment strategy. But you can assign a slot much earlier.
Please come back, if you can ask a specified question?

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