REPLY Hybrid Discrete/Continuous Examples (SD6047)

[Jean-Jacques Laublé jean-jacques.lauble wanadoo.fr]

Posted by  Jean-Jacques Laublé <jean-jacques.lauble at wanadoo.fr>
Hi every body.

 

About Anylogic, one thing is not clear to me.

With usual DES packages you do not have any feed backs. 

You can have levels that are cumulated all over the time of the simulation but with 

no regular values during the simulation.

In extend you have stocks but no feed backs even with it is working continuously.

I am talking about the version that is already 4 years old that I have tested.

The explanation of the lack of feed back is simple.

To have feed backs it is necessary to have a value that can influence the same value 
some time later. With DES where there are no fixed time steps, and no associated 
values, it cannot be done. SD deals with aggregate that change with time, and DES 
deals with events and when they happen.

So it would be interesting to know how, one can have at the same time a fixed slicing 
of the time, events occurring for instance on a relatively short time scale, 
generating queues for instance, stocks being calculated every time step, generating 
feed backs, and how all these values influence one another.

The people of Anylogic should give a preferably very simple example that illustrates 
how it works. 

I find already difficult to use efficiently the SD paradigm, and do not need a still 
more complicated method! 

Regards.

Jean-Jacques Laublé.
Posted by  Jean-Jacques Laublé <jean-jacques.lauble at wanadoo.fr>
posting date  Thu, 9 Nov 2006 18:59:52 +0100