Seperator Splitting Issue - Exponential Growth!!!!

Question

question

Przemyslaw R asked Sep 23, '21 Phil BoBo answered Sep 23, '21

Seperator Splitting Issue - Exponential Growth!!!!

Hi FlexSim gurus! I have created a Future State yesterday and my model including seperator logic (only one batch splitted into 48pcs allowed in Queue7) was working fine. But from today it keeps multiplying number of newly created items in exponential way. Every item split should be 48, but second split is doubbled and 3rd one is doubbled of 2nd etc.

Is it a bug or did I messed something up?

EF327 Future State.fsm

Software Version:

FlexSim 21.1.5

seperator

ef327-future-state.fsm (38.8 KiB)

· 1

Przemyslaw R commented · Sep 23, 2021 at 12:05 PM

I think it's important to mention that yesterday(when everything was fine) I had 21.1.2 version. This morning I updated to 21.1.5

0 ·

Answer 1 · 2021-09-23T14:03:09Z

Phil BoBo answered Sep 23, '21

This model is behaving exactly the same in 21.1.2 and 21.1.5.

It looks like what changed is that Separator1's processing time was changed to 0. If you set the processing time to 1, then it behaves as you would expect.

The Separator is not creating exponential growth in how many splits it is making per flowitem. It is still producing 48 items per split. The problem is in how many items it is receiving.

With a processing time of 0, it is receiving more than 1 item at a time because of the timing of events. If you watch the EF327GS queue, you can see that it is sending multiple items to the separator all at once, each of which is being turned into 48 items.

You can work around this event timing issue by either using a processing time, or closing the input on entry of Separator1 and then reopening it at a later event. That will cause a delay in the processing of the event sending items from the EF327GS queue such that it will work properly.

ef327-future-state_1.fsm

ef327-future-state-1.fsm (38.8 KiB)

question