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Amy avatar image
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Amy asked Amy commented

Patient Moving Alone in Escort Transport

My license has expired, but I have an urgent issue and don’t understand why this is happening, so I’m posting this question. I would be very grateful for your help.


I am creating a transportation process model. When staff go to pick up a patient, the patient is supposed to move together with the staff. However, sometimes the patient moves by themselves. I really don’t understand why this is happening, so I’m asking for help.

It happens on 06:59:00 (25080).


practice_v8.5.fsm

FlexSim 21.2.4
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practice-v85.fsm (669.3 KiB)
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1 Answer

Felix Möhlmann avatar image
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Felix Möhlmann answered Amy commented

With how the dividers are currently set up, it should be impossible for a task executer to enter the room in the screenshot.

capture1.png

The tech involved in the issue ends up in the room somehow anyway. Now when he gets a task to travel somewhere else, no valid path is found, so the travel task terminates prematurely. The patient then walks to the destination by themselves as part of the "Enter Location" task. You can see this when you observe the inner flow of the "Transport Patient" activity.

Widening the opening so there is a path into and out of the room should fix the problem. When viewing the grid nodes (option in the "Visual" tab of the A* navigator), the yellow lines indicate which neighboring cell can be reached from a given node. So make sure such a connection exists for each room.


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Amy avatar image Amy commented ·

@Felix Möhlmann,

Thank you so much for your help.
I managed to fix the previous problem!
However, I'm encountering another issue now. You can see it in the video.

I'm not sure why the staff sometimes return the transportation to that one spot. Also, it's strange how it disappears. (07:44:15 2023-10-23 [27855])


The transportation is at the location shown in the photo.

1716472735836.png

Could you help me with this?

drop_transportation.mp4


practice_v9.0.fsm


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Felix Möhlmann avatar image Felix Möhlmann Amy commented ·

This is a bug. The transport equipment is attached to a Process Flow that returns it to its reset position when it is no longer in use. You can deactivate this by setting the "Return Condition" to 0.

capture1.png

The reset position of the wheel chair is inside the "Floor5" object. As such, the coordinates of the reset position are relative to this object. However, when the object is returned there, the reset coordinates are interpreted as global coordinates. This means the wheel chair is moved to where you see it in the video. It teleports there because the tech cannot find a path all the way to that location.

This bug was fixed version 23.0.9. The only workaround I can offer for your model is to have the reset position be global. (Or deactivate the return behaviour)

Select the transport equipment and move it into the model in the "Edit Selected Objects" window (under "View" in the top bar menu). Then clear and re-set the reset position in the right-click menu.

capture1.png

practice-v90_1.fsm

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practice-v90-1.fsm (727.8 KiB)
Amy avatar image Amy Felix Möhlmann commented ·
@Felix Möhlmann, Thank you so much for your help!!!!
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