How to understand AnyLogic source generated pattern?

Question

whats the meaning of setting up a new source element from the PML library with the following parameters?

Arrivals defined by: interarrival time;
Interarrival time: exponential(1) - minutes;

how often it generates new agents? I'have read the documentation but I don't understood.

score 2 · Accepted Answer · answered Nov 17 '16 at 11:28

2

I'm not sure if you're interested in all the statistical part of the distribution so I'll keep it simple.

When you have an exponential distribution exponential(lambda) you have the following:

Expected value E(X) (mean): 1/lambda
Variance V(X): 1/lambda^2
Standard Deviation = sqrt(Variance)

Therefore the standard deviation is the same as the mean.

Those are the basics about the exponential distribution. In your case, you are using an exponential distribution with lambda = 1 which means the mean will also be 1 so, in average, your interarrival time will be 1.

If you had lambda = 2 your average interarrival time would be 1/2 = 0.5.

Hope that helps

answered Nov 17 '16 at 11:28

luizfvpereira

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So, if I understood correctly calling "exponential(4)" with simulation time is setting up to "minute" the source block on average will generate 1 agent every 15 seconds? – Andrea Meneghinello Nov 17 '16 at 11:59
yes it will. If you want to confirm that in anylogic just run the model for a large amount of time and measure the average time between arrivals. – luizfvpereira Nov 17 '16 at 12:13
Thanks for your time – Andrea Meneghinello Nov 17 '16 at 12:19

How to understand AnyLogic source generated pattern?

1 Answers1