Slot Stacking Order not working

[roi_sn]

[ FlexSim 22.0.1 ]

Hi everyone,

Following this question, I am changing the Slot Stacking Order during the simulation basically to get items of the same type stacked across Y+ and items of different type across X+ if there is space in the slot. However, there are certain times in which red and green items (type 1 and 2) got mixed in the same slot across Y axis even though the Stacking Order is set apparently right.

Am I missing something?

22.0 Demo Model Reacomodos_1.fsm

[jason_lightfootVL7B4 · Accepted solution]

If there's space in the slot then the item will go there - there's no rule to say items have to be aligned with others of the same type. Can you step though and show us the allocation and position sequence you think is wrong?

[roi_sn]

Thanks for the answer Jason.

For example, in this situation in which the red item has space in both directions (across X+ and Y+), I have previously set that the Slot Stacking Order has to be prioritized across X+ because the other item is different and so, it should not be stacked across Y+.

I mean, it should be placed on the red cross but in my case for this particular seed, it is wrongly placed on the green one.

I guess I am not fully understanding what the Slot Stacking Order accounts for, I mean, it is a way of prioritizing but not preventing, right?

Do you come up with some workaround apart from setting the local coordinates of the items within the slots?

[joerg_vogel_HsH]

Slot is lowest category in Warehousing. I would use in such a case more smaller slots and work with labels to summarize adjacent slots to a slot group to achieve a desired mechanism.

[roi_sn]

The size of the items that can be stored is variable. I already came up with this approach but discard it because of this.

[jason_lightfootVL7B4]

Could you give some examples of valid arrangements and invalid one?

[roi_sn]

Thanks for your help @Jason Lightfoot. Let me explain it again:

- Items of different type (color) can´t be stored across Y in the same slot. Preferrably, they will be stored in a partially occupied slot, but across X if there is space. If not, they will be stored in an empty one.

- Items of the same type can be stored across Y if there is space. If not, they will they will be stored in a partially occupied slot across X if there is space. If not, they will be stored in an empty one.

So, this is invalid arrangement:

And this would be a valid one:

As you could see in second 12, the red item is stored in front of the green one even though the stacking order for the rack is apparently set according to the defined criteria and there is enough space in X to store it:

I attach the model.

22.0 Demo Model Reacomodos_3.fsm

Thanks again!

[jason_lightfootVL7B4]

Okay - so that sounds like you want the equivalent of a dynamic slot width - right?

[roi_sn]

Yes, this could work for me. How you would set up an approach like this?

[jason_lightfootVL7B4]

This is probably not supported but I thought I'd try it and see what breaks (model attached) It's not exactly what you want either which may also limit the value.

Something appears to be wrong with the slot sizing - if I get a chance in the future, or you think it will do what you need, we can revisit it.

TestDynamicSlots.fsm

This is the resulting slot sizing and labelling (painted)

[roi_sn]

Thanks Jason, it was very useful to me. In my case, items seem to be overlapping between them, I don´t know if in your too. I will take a look at it.

[jason_lightfootVL7B4]

Hi - yes that's the slot sizing error I mentioned.

Did you manage to get further with this? Should we look at it further to see if there's a fix?

[roi_sn]

Sorry Jason I did not have to time to look at it. I will try this week.

[iago_mf]

Hi Jason,

I was exploring your method, but I've found a problem that we can't solve. When you edit slot size having more than one slot per bay, FS always resize the others slots even if we do it by code as in your example, so we can't control slots dimensions propertly, Do you know how could we stop Fs resizing the others slots in bay?

This is what is happening, even by code:

ResizeSlots.gif

[jason_lightfootVL7B4]

Thanks for this insight - if I find a solution I'll post back.

[jason_lightfootVL7B4]

Here's the fixed model. I've added a user command "setSlotSizes" which takes the level and an array of slot sizes. When the number of slots is less than the array size+1 it adds a slot and gives it the remaining width.

TestDynamicSlots2.fsm

[iago_mf]

Thank you very much!

[roi_sn]

Thank you Jason!