Generating token based on probability and distribution

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Vns asked Jan 29, '23 Felix Möhlmann commented Jan 30, '23

Generating token based on probability and distribution

Hi -

im not quite sure if there is a way to generate tokens based on the following conditions:

Set a probability for token creation for each hourly slot. In the event a token where to be created set a randomize quantity distribution to be generated.

Time interval	Probability	Qty
0600 - 0659	20%	1 - 4 (2)
0700 - 0759	50%	1 - 4 (1)
0800 - 0859	10%	1 - 4 (4)

Thanks in advance.

Software Version:

FlexSim 22.0.8

token distributions probability

Answer 1 · 2023-01-29T16:28:13Z

Felix Möhlmann answered Jan 29, '23 Felix Möhlmann commented Jan 30, '23

To use different expressions for the hours of the day, it would be best to use the "Date Time Source".

One way to either create no tokens or a random number is to just multiply two distributions together. "bernoulli" can be set up to either return 1 or 0 with the given probability. So only if it returns 1 will the quantity be something other than 0. The second distribution controls the quantity if it does return 1.

1675009684625.png (29.5 KiB)

· 4

Jason Lightfoot ♦ commented · Jan 29, 2023 at 05:41 PM

bernoulli takes a percentage value not probability - so bernoulli(20,1,0) gives 20% chance of returning 1.

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Felix Möhlmann Jason Lightfoot ♦ commented · Jan 29, 2023 at 05:56 PM

Right, that's an oversight on my part. Thanks for the correction.

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Vns commented · Jan 30, 2023 at 04:21 AM

Thanks @Felix Möhlmann / @Jason Lightfoot for sharing the inputs.

I can't seems to get the model to run to generate the tokens based on this setup. Is there a step that i missed? probability and distribution.fsm

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probability-and-distribution.fsm (29.3 KiB)

Felix Möhlmann Vns commented · Jan 30, 2023 at 07:00 AM

Put the expression into the Arrival field at the bottom that appears when you have a table cell selected, not into the table directly. (Writing it into the cell directly interprets it as text, not FlexScript).

In your case the resulting table should look like this:

You only see the first row of the code that gets auto-generated when you type in the expression. This was changed in version 22.2 which my screenshot above is from.

Sorry for the confusion.

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1675061928943.png (6.0 KiB)

1675061949963.png (6.0 KiB)

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