topic how to make an empirical distribution in FlexSim Forum

how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 13:27:34 GMT

[ FlexSim 23.2.1 ]

Good day, this has not happened to me before, I have a concern when I used experfit but experfit does not find a good statistical distribution setting and it recommends an empirical statistical distribution, how do I do this, the empirical distribution as a load to the program or what are the steps for that? If I want to use those times in the loading and unloading of an operator in seconds

Likewise, you reject all hypotheses.

Re: how to make an empirical distribution

jason_lightfoot_adsk — Wed, 08 Nov 2023 13:51:37 GMT

How to set one up and then access it.

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:07:47 GMT

No lo estoy haciendo bien pero ya generé la distribución empírica, ahora ¿cómo ingreso el tiempo de ejemplo en el procesador para que tome esos tiempos de forma aleatoria?

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:08:45 GMT

@Jason Lightfoot

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:20:50 GMT

@Jason Lightfoot Take note of that example to better understand the empirical distribution, but in my understanding, the empirical distribution table is supposed to take any value and set the process time, but it doesn't do that. Can you help me correct it?

time exper.fsm

Re: how to make an empirical distribution

jason_lightfoot_adsk — Wed, 08 Nov 2023 14:31:11 GMT

You had this:

You need this:

ie:

No extra 'return'
The correct distribution name
No final semicolon.

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:39:53 GMT

One more question as an example, the data that I enter in the distribution table is following an order, is it taking time one at a time or is it taking randomly from those 15 values and configuration, the empirical distribution is entered is correct, I don't have it. What to do, nothing more sorry than the first time I use an empirical distribution

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:45:13 GMT

@Jason Lightfoot Explain to me, help me with a summary of what that empirical distribution table does, how it takes the data in an ordered or random way and if the shape that the data takes is correct or do I have to modify something else in the empirical distribution. What happens if I put a discreet type?

Re: how to make an empirical distribution

jason_lightfoot_adsk — Wed, 08 Nov 2023 14:48:20 GMT

It's described in the link.

You have it set to continuous which generates these example samples:

If you set it to discrete it has these example samples:

Re: how to make an empirical distribution

Swa12 — Wed, 08 Nov 2023 14:52:08 GMT

I have questions. Is it good to use an empirical distribution in all cases because the experfit recommended me to use an empirical distribution and I didn't find a solution?

Re: how to make an empirical distribution

jason_lightfoot_adsk — Thu, 09 Nov 2023 13:15:30 GMT

That's really for you to decide, but of course if there's no good fit then you could use it. Note that some distributions that are available in FlexSim may not be in the list of tests that ExperFit tries - triangular is one - so it's good to check the sample pdf visually in case you spot a match.

When you do use empirical data you might try to get more data points than 15 - the more the better.