Is it possible to run simulation partially for a part of model?

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Pranav Purohit asked Mar 2, '17 Pranav Purohit commented Mar 13, '17

Is it possible to run simulation partially for a part of model?

Hello,

I have a general question about discrete event simulations.

I understand to start a simulation, entities/ flow items need to be created at source. But I have project specific requirement that needs to run a simulation for a part of the model. Is it possible to run the simulation from any random point of the model? Like say, total run time for model is 30 days from March 1st to March 30th. Is it possible to start simulation from 15th day that is, March 15th to March 30th? I hope example explains my query well. Thanks.

Software Version:

FlexSim 16.2.2

simulation time

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Pranav Purohit commented · Mar 02, 2017 at 06:35 PM

@Ruben Mariduena, @sanaz karamimoghaddam

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Sam Stubbs ♦ Pranav Purohit commented · Mar 13, 2017 at 08:58 PM

As we talked about on the phone, here is a link with some advice on how to trim down / speed up a model to make it run more smoothly.

https://answers.flexsim.com/questions/25025/speeding-up-a-simulation-model.html

Unfortunately there's not really a way to just start from any point in the model. The model needs to go through the logic/ make all the calculations to get from point A to point B to know how it's supposed to behave. So the later parts of a simulation are reliant upon the information from the earlier parts of the model. But using some of the tips above, should help speed up the model a bit.

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Pranav Purohit Sam Stubbs ♦ commented · Mar 13, 2017 at 09:19 PM

Thanks for the link Sam. I understand the model runs lots of logics/ calculations on the back. But I was trying to reduce the simulation time. However more simplifying / trimming the model down might help a little here. Thanks a lot for providing me with the information.

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Kari Payton commented · Mar 02, 2017 at 07:49 PM

When you start a new model there's an option to enter start time as a date. Or are you trying to have it run for 2 weeks then collect data after that point? @Pranav Purohit

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Pranav Purohit Kari Payton commented · Mar 02, 2017 at 08:44 PM

Considering first two weeks are running fine, I am trying to start running model from third week. I could choose the start date and time as you said earlier but couldn't find any option to start at any point after the start date and time.

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Kari Payton Pranav Purohit commented · Mar 02, 2017 at 09:16 PM

Yeah once you set the parameters at the start you can't go back and change it.

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Answer 1 · 2017-03-02T20:17:20Z

Sam Stubbs answered Mar 2, '17 Pranav Purohit commented Mar 2, '17

Whenever you run the model, it will run the entire model so as to get any calculations needed before moving on to another time of the model. However, using the experimenter and the dashboard widgets you can certainly gather statistics on certain sections of time within the model. If you look in the User Manual under both the Experimenter and Dashboard sections it gives more information about this.

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Pranav Purohit commented · Mar 02, 2017 at 08:49 PM

Thank you very much for replying to my query Sam. I am trying to put logic in experimenter for partial data collection. But I am new to the FlexSim and my project demands partial data gathering. So I was curious if such flexibility is available in the simulation software.

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Answer 2 · 2017-03-02T21:16:16Z

Kari Payton answered Mar 2, '17 Pranav Purohit commented Mar 2, '17

@Pranav Purohit If this helps, you can set a user event (toolbox - add - modeling logic - user event) and use the command resetstats() at t=15 days. This will reset all statistics at that time without resetting the whole model.

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Pranav Purohit commented · Mar 02, 2017 at 10:23 PM

Thank you very much for the tip. I will try this and will see if this logic works for me

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