Retain minimum quantities in a Queue before releasing

Question

question

Rohith V asked Jul 23 2024 at 8:39 PM Jason Lightfoot commented Jul 24 2024 at 4:57 PM

Retain minimum quantities in a Queue before releasing

I'm looking for some help to understand a better way to have a queue release parts to one of the output port only when the minimum quantities has been reached. I will still need this queue to release parts to the other output port regardless of the minimum quantity.

Thank you in advance.

Software Version:

FlexSim 22.2.0

minimum minimum stock waiting in queue

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Answer 1 · 2024-07-24T09:58:39Z

Jason Lightfoot answered Jul 24 2024 at 9:58 AM Jason Lightfoot commented Jul 24 2024 at 4:57 PM

You don't say how many you want to release to the other port when the minimum level is reached.

If it's all of them then you can either route the port in the sendto based on rank or have the downstream queue pull - for example only pulling items with a specific rank.

SpecificRank_Overflow.fsm

specificrank-overflow.fsm (27.9 KiB)

· 3

Rohith V commented · Jul 24 2024 at 1:47 PM

Thank you!

0 ·

Rohith V commented · Jul 24 2024 at 3:23 PM

Hi Jason, With the same model you shared, I added operators for transport and linked them to a dispatcher. I also set the queue max content limits. Now, I notice the queue 3 stops pulling after the first run. When I don't have transporters this model works fine. Will you eb able to tell me what is changing after I add the operators which is stopping queue 3 to pull from queue 1.

specificrank-overflow.fsm

0 ·

sim-query.jpg (92.7 KiB)

specificrank-overflow.fsm (38.0 KiB)

Jason Lightfoot ♦♦ Rohith V commented · Jul 24 2024 at 4:57 PM

Try changing the specific rank code to:

return item.rank >= ranknum;

0 ·

Answer 2 · 2024-07-24T08:30:05Z

Joerg Vogel answered Jul 24 2024 at 8:30 AM Rohith V commented Jul 24 2024 at 1:47 PM

You can let pull a following object items of a queue, then you can set conditions like

object.subnodes.length > 10

to receive items.

If you want to close an output port then you can do this only by adding further queue objects in your item flow structure. Such queues have a capacity of one and you have to evaluate the stored items of all queues together.

close-output-port-number.jpg (10.5 KiB)

· 1

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