Why tokens are not created at the corresponding times (Schedule source) !

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sara S2 asked Mar 26, '20 sara S2 commented Mar 31, '20

Why tokens are not created at the corresponding times (Schedule source) !

Hello,

In the process flow "Replenish meds for administration in ICU/WA" (Fig1) I have the following planning "ConPlanning" (Fig1). Till the time 4632 minutes tokens are created correctly but from the time 5434 minutes tokens are not created at the corresponding times. For example, the token is created at 5534 minutes instead of 5434 minutes (difference of 100 minutes) ! I found this very strange. I really can't understand the reason of this trouble; may be I clicked on something with no attention while I filled those times. Please if anyone have an idea about this trouble or have already encountered the same situation, help me to understand this.

Regards.

fig1.png

Software Version:

FlexSim 19.0.0

schedule source

fig1.png (38.2 KiB)

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Braydn T commented · Mar 26, 2020 at 12:43 PM

@sara S2

Could you upload your model so we can take a closer look?

Thank you!

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sara S2 Braydn T commented · Mar 26, 2020 at 01:24 PM

@Braydn T, unfortunately I can't, it is a confidential work. I really wish I could! I posted the question hoping that someone who encountered the same trouble could help me.

@@Braydn T, thank you for trying to help.

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Braydn T sara S2 commented · Mar 26, 2020 at 01:27 PM

We can set this question to private, so no one else can see it, but without seeing the behavior it will be hard to troubleshoot.

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Matthew Gillespie ♦♦ commented · Mar 26, 2020 at 03:56 PM

If you copy that activity into a new model does it create the tokens at the right time?

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sara S2 Matthew Gillespie ♦♦ commented · Mar 26, 2020 at 07:58 PM

@Matthew Gillespie, I know this is much harder and I am sorry for this. I am grateful for your help.

Okay, I am going to copy this process flow and the attached global tables and I will tell you the result.

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sara S2 Matthew Gillespie ♦♦ commented · Mar 28, 2020 at 11:46 AM

@Matthew Gillespie,

I copied the activity into the attached model, the problem is still existing.

activity-trouble.fsm

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activity-trouble.fsm (20.1 KiB)

Answer 1 · 2020-03-30T16:25:40Z

Brandon Peterson answered Mar 30, '20 sara S2 commented Mar 31, '20

@sara S2

The reason that you are seeing tokens created at the wrong times in your model is because the times are not sequential. In the attached picture (from your last model) you can see that row 589 is at time 4527 which is before row 588 at time 4626. The scheduled source is looking at the difference in time between rows. This means that 589 is created at 4626 (because the difference was < 0) and row 590 is created at 4627 because the difference between 589 and 590 was 1.

It looks like the times were entered wrong and the fix would be to correct the times. If the times are correct then rows 589 and 590 need to be moved so that the arrival times are all in sequence.

Hope this helps,

Brandon

2020-03-30-10-29-16.png (19.1 KiB)

· 1

sara S2 commented · Mar 31, 2020 at 11:25 AM

@Brandon Peterson, thank you very much for your help.

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