question

Óscar Manuel CMN avatar image
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Óscar Manuel CMN asked Benjamin W2 answered

push to list

Hello
The intention of the model is for operators to take items from the queues and take them to their corresponding processors. Well, the operator has to stay in that work center (queue + machine) until the number of items that were in the queue when the operator arrived runs out. To choose a queue, the operator extracts the queue from a list called QueuesList.

The problem is that after a certain number of items, in zone 3 and zone 2 of the model, the operators do not return the queue to the list, and then the queue cannot be acquired again and the items begin to pile up. I don't know why this happens.

Somebody could help me?

FIFO-WHN4-SQ-K2.fsm

19.0.0 Version

FlexSim 19.0.9
flexsim 19.0.9push to list
fifo-whn4-sq-k2.fsm (543.2 KiB)
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1 Answer

Benjamin W2 avatar image
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Benjamin W2 answered Óscar Manuel CMN commented

Hi @Óscar Manuel CMN,

You have an error in your logic flow. There is a chance that a token will travel back to the "Pull from List: Shortest Queue" before the token ever reaches its "Push to List: Queue Backs to list". See the following image:

This occurs on ZONA2 at 638 seconds in the attached model.

fifo-whn4-sq-k2.fsm


1591890166340.png (210.2 KiB)
fifo-whn4-sq-k2.fsm (543.5 KiB)
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