Double shift troubleshoot

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AnneK asked Apr 24, '24 Jason Lightfoot commented yesterday

Double shift troubleshoot

Hi,

I am trying to set up the double shift using process flow and custom code to close and open ports for operators with timetable shifts.

However, I ran into an error for CT weight CG, paint and goop, and CT weight CG_ER_SiAW work cells, which didn't show before I assign the two shifts to labor resource and remove the dispatchers (Assembler/Tester and Inspector) out from my timetable. It seems there are conflict between the labor shifts in process flow and the resources members assigned to the time table. Could someone help to troubleshoot and advise what might go wrong?

Please find my model here:

R25_TS_Multiple Shift.fsm

Software Version:

FlexSim 23.1.0

processs flow timetable multiple shift

r25-ts-multiple-shift.fsm (2.4 MiB)

Answer 1 · 2024-04-25T12:54:59Z

Jason Lightfoot answered Apr 25, '24 Jason Lightfoot commented yesterday

You have an exception at time 1951.687 since there is a process finish event and no item related to it. At some point the item is removed from the processor before it is finished processing - in this case at 1951 hrs. It looks like you're delaying the operator rather than have them utilized by the processor. That means the delay is independant of what's happening on the processor.

1714051004252.png (32.2 KiB)

· 2

AnneK commented · Apr 25 at 06:55 PM

Hi Jason,

Thanks for the explanation. I wonder how it happens? because before I remove the operator dispatcher from the timetable, this error doesn't show up. So, I am assuming the nonconsistency of down time schedule of operator and processor lead to this error. How can I make sure the processor and the operator delay were dependent for those cells when there are two shifts?

Thank you.

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Jason Lightfoot ♦ AnneK commented · yesterday

There are many ways to coordinate the activities but for your process flow the simplest may be to only have the process time on the processor and wait for the process finish event. However this does not allow the operator to pause the processor if they go off shift - for that you need to have the operator wait in a UTILIZE task that references the processor and item being processed (example attached).

processFlow_utilizeTask_example.fsm

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processflow-utilizetask-example.fsm (40.1 KiB)

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