How to add variability in model using distributions and experimenter?

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AM2023 asked Apr 2, '24 Jeanette F commented Apr 8, '24

How to add variability in model using distributions and experimenter?

I am working on a model for a class and am stuck on how to add variability into my model when I run the experimenter. For each combiner, I have set the processing time to be a normal distribution. I need the processing times of each combiner to change with every replication within that defined distribution. When I run experimenter, I get the same result every time. The performance measure I want to track is the input to the sink, which tells me the throughput for the work cell.

Do I need to use parameters? If so, how?

Any help would be much appreciated. Also please note that we are in the very basic stages of learning and are very new to flexsim. I need explicit, clear, and simple instructions please!

This model is basically an assembly line with 4 operators at 4 different workstations (combiners).

Assumptions_Model2 (1).fsm

Software Version:

FlexSim 23.1.0

experimenter variability

assumptions-model2-1.fsm (79.1 KiB)

· 3

Joerg Vogel commented · Apr 02 at 09:14 PM

Let me assume you want to have a variability of a normal function. Then you need a parameter to be variable for mean and another for deviation values.

Edit and you need a license version that differs from express.

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AM2023 Joerg Vogel commented · Apr 03 at 12:46 AM

Can you please explain in more detail and perhaps with an example?

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Jeanette F ♦♦ commented · Apr 08 at 03:10 PM

Hi @AM2023, was Felix Möhlmann's answer helpful? If so, please click the "Accept" button at the bottom of their answer. Or if you still have questions, add a comment and we'll continue the conversation.

If we haven't heard back from you within 3 business days we'll auto-accept an answer, but you can always comment back to reopen your question.

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Answer 1 · 2024-04-03T06:39:09Z

Felix Möhlmann answered Apr 3, '24

The total throughput is currently limited by the output rate of the "Conveyor Source" (though only by a small margin). If you decrease its inter-arrival time, you will start to see different results.

1712126316766.png (10.8 KiB)

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