Why find slot activity not working?

Question

question

anon-user asked May 08 2023 at 11:56 AM Joerg Vogel commented May 09 2023 at 4:54 AM

Why find slot activity not working?

Hi Flexsim Team,

Please help me to fix findSlot activity issues. I have built a conceptual model wherein PS(AGV) takes items and delivers them to the bottom level and R8(AGV) takes those items and places at the above levels.

So, In the findslot activity, I have given the condition slot.slotItems.length < 7 but this condition is not getting followed by the activity. It is placing more than 6 items in the slots.

Thanks and Regards,

Brijesh Kumar

Software Version:

FlexSim 23.1.1

warehouse

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Answer 1 · 2023-05-08T13:27:13Z

Jason Lightfoot answered May 08 2023 at 1:27 PM Joerg Vogel commented May 09 2023 at 4:54 AM

You need to choose slots from the same rack:

WHERE slot.Type!=3  AND slot.slotItems.length<7 AND slot.storageObject==$1.RackName

· 6

Joerg Vogel commented · May 08 2023 at 2:18 PM

It is a runtime problem. An assigned slot is counted to length property, when the slots gets occupied by an item. As long as an item has not entered its assigned slot the property length is not suited to limit an amount. The method "hasSpace" evaluates in contrast to this approach the size of all assigned items and not only the entered items.

I compare both to fill a slot with 4 items. Please see attached model.

Rack_slotItems_length.fsm

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slot-slotitems-length.jpg (139.6 KiB)

rack-slotitems-length.fsm (43.5 KiB)

Jason Lightfoot ♦♦ Joerg Vogel commented · May 08 2023 at 2:24 PM

No, the slotItems length is working correctly in the model and accounts for inbound items as expected.

In your model you don't hold the items until a slot is available and send them to the rack anyway - and items entering without a slot using the rack's slot assignment strategy to find one.

Here's your corrected model attached.

rack-slotitems-length_jl.fsm

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rack-slotitems-length-jl.fsm (43.6 KiB)

Joerg Vogel Jason Lightfoot ♦♦ commented · May 08 2023 at 3:25 PM

@Jason Lightfoot, I was aware of that that items were sent anyway if there hadn't been found a slot. My Problem is "slot.slotItems.length < 5" and I see 5 items entering such a slot. I think 5 items is one too much for such a condition. My assumption might be wrong to describe this behavior.

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anon-user commented · May 08 2023 at 2:29 PM

Thanks @Jason Lightfoot .

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