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Juan Andres C avatar image
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Juan Andres C asked Braydn T commented

Truck Offloading Model

Hi,

I'm working on a project for one of my classes at school which deals with a truck flow optimization problem. I'm currently simulating the current process to determine bottlenecks and potential improvement areas.

I have started the model but I'm a little stuck due to my lack of knowledge with FlexSim. Any help would be greatly appreciated. Below is the processes the truck follow:

1. Truck arrives to facility and weighs-in at the scale (this process takes between 3-5min)

2. Truck proceeds to designated parking area and parks truck. (2-4min)

3. Driver gets out the cab and walks to scalehouse to drop paperwork.(1-2min)

4. Driver returns to truck(1-2min)

5. Truck proceeds to entrance gate of facility and checks-in with guard (1-2min)

6. Truck proceeds to offloading station and offloads product (40-45min)

7. Truck proceeds to exit gate of facility (same as entrance gate) and checks-out with guard

8. Truck proceeds to designated parking area and parks truck (2-4min)

9. Driver gets out the cab and walks to scalehouse to collect paperwork.(1-2min)

10.Driver returns to truck (1-2min)

11.Truck Weighs-Out at the scale and leaves facility (3-5min)

Thank,

Juan Caicedo

truck-offloading-process-simulation.fsm

FlexSim 20.0.2
logisticssupply chaintraffic flowtruck flowtruckvehicle waiting time
slide1.png (1.6 MiB)
truck-offloading-process-simulation.fsm (3.9 MiB)
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Braydn T avatar image Braydn T commented ·
@Juan Andres C

Hi Juan! I am looking at your model, and it looks like you are doing pretty well! Which part do you need help with specifically?

If you haven't please read our best practices here: https://answers.flexsim.com/articles/22192/best-practices-for-using-this-answers-site.html

We can help you best if you tell us specifically what you dont know how to do.

Thanks!

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Juan Andres C avatar image Juan Andres C Braydn T commented ·

Hi @Braydn T,

My first question is regarding step 2 (parking area). I was wondering if a queue is the correct object to have in that step. Is there a way to make the flow item (truck) wait in the queue for some time before it can proceed to the next step? and/or is there a way to simulate the truck driver walking from the parking area to the scale house and back to the truck before moving to the next step?

Thanks,

Juan Caicedo

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1 Answer

Braydn T avatar image
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Braydn T answered Braydn T commented

@Juan Andres C

If the trucks leave in the same order they arrive, I would use a processor. IF not, and you need some other custom strategy I would use Process Flow and a queue. To simulate the driver, I would have a instance of process flow that fires when the truck arrives at the queue/processor, the creates an operator object at the truck, and then has him walk over to the scale house and back. When he gets back you can destroy the operator object. If you want that to be the decider for the truck leaving, you can have the Operator wait a certain amount of time at the scale house, and then you can have another trigger fire when he goes back to release the truck.

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Braydn T avatar image Braydn T commented ·

@Juan Andres C

Did this answer help you? If so, could you please accept it? If not, could you let us know what else we can do to help you? Thanks!

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