Generating token based on probability and distribution

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question

Vns asked Jan 29 2023 at 11:48 AM Felix Möhlmann commented Jan 30 2023 at 7:00 AM

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

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Answer 1 · 2023-01-29T16:28:13Z

Felix Möhlmann answered Jan 29 2023 at 4:28 PM Felix Möhlmann commented Jan 30 2023 at 7:00 AM

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 5:41 PM

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

1 ·

Felix Möhlmann Jason Lightfoot ♦♦ commented · Jan 29 2023 at 5:56 PM

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

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Vns commented · Jan 30 2023 at 4:21 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

0 ·

probability-and-distribution.fsm (29.3 KiB)

Felix Möhlmann Vns commented · Jan 30 2023 at 7:00 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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