Pull from Item List

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Rahul T5 asked Nov 1, '22 Kavika F commented Nov 16, '22

Pull from Item List

Hello,
I am trying to simulate optimum queue size between two shops: Shop 1 (batch size of 5) feeds Shop 2 (no batching requirement). There are 10 variants with different mix percentages. I created a pseudo-random sequences for both shops. For Shop 2: 100 entries with said mix percentages. For Shop 1: 500 entries with same variant sequrence as Shop 2. Queue between shops pushes items to ItemList and Shop2 pulls from itemlist. But this does not help with right sizing the queue.
What will be the best way to randomize the pull order for Shop2 and trigger the batch sequence in sync with the demand from Shop 2.

Software Version:

FlexSim 22.2.0

pullrequirement pulling item list

1667262632297.png (16.4 KiB)

bodycolor.fsm (233.0 KiB)

· 3

Kavika F ♦ commented · Nov 02, 2022 at 10:18 PM

Hey @Rahul T5, could you clarify what you mean by "trigger the batch sequence in sync with demand from Shop 2"? Also, it helps us when the names you use in your question match the names of objects in your model - that way we can understand your question easier, thanks!

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Rahul T5 Kavika F ♦ commented · Nov 02, 2022 at 10:50 PM

Sure thing. Meaning shop 2 can randomly (and independently) pull one of the 10 labels (BodyColor in this case) from Queue. And based on the queue content and WIP on “conveyor Shop1”, this can trigger which label will be processed next by shop 1.

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Jeanette F ♦♦ commented · Nov 15, 2022 at 11:02 PM

Hi @Rahul T5,

We haven't heard back from you. Were you able to solve your problem? If so, please add and accept an answer to let others know the solution. Or please respond to the previous comment so that we can continue to help you.

If we don't hear back in the next 3 business days, we'll assume you were able to solve your problem and we'll close this case in our tracker. You can always comment back at any time to reopen your question, or you can contact your local FlexSim distributor for phone or email help.

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Answer 1 · 2022-11-04T20:02:04Z

Kavika F answered Nov 4, '22 Kavika F commented Nov 16, '22

Hey @Rahul T5, in response to pulling a random entry off the list, you can try this approach. I removed the "meetsrequirement" expression and the "Type" label from the ItemList1 properties. Then I added the "BodyColor" label to the ItemList1 so we could pick items based on that. Then I added some code that generated a query based on a random duniform distribution:

if (list.entries().length > 1) {
  Object queue = Model.find("QueueSizeToOptimize");
  treenode flowitem = queue.subnodes[duniform(1, queue.subnodes.length)];
  int bodyColor = flowitem.labels["BodyColor"].value;
  queryStr = "WHERE BodyColor = " + bodyColor;
}

Basically, I'm pulling a random flowitem from the queue, grabbing its color, and pulling any item from the list with that color.

· 4

Rahul T5 commented · Nov 09, 2022 at 05:01 PM

Hi @Kavika F,

Just to confirm, the custom code you posted above will be the "Pull Requirement" under Input panel?

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Jason Lightfoot ♦ Rahul T5 commented · Nov 10, 2022 at 04:14 PM

No that code was edited from the Pull Strategy.

Can I confirm that you want to pull the same ratio as per the table of items randomly onto shop2 but up to a limit of 100? So when it's empty you'll just try to get as close as possible? Is there a minimum dwell time in the store for painted bodies?

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Rahul T5 Jason Lightfoot ♦ commented · Nov 16, 2022 at 05:38 PM

Hi Jason,

yes, I wanted to model pulling from a list of 100 - so that as the product mix % changes, there is only one place I will need to make an update.

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