Different Process time for different inter arrival time flow item

Question

question

Ali Asghar asked Oct 17 2024 at 5:30 AM Felix Möhlmann commented Oct 17 2024 at 10:06 AM

Different Process time for different inter arrival time flow item

I want to develop a logic where I can have different process time for different flowitems that arrives in the model.

The source creates model based on uniform distribution(10,70), now I need my processor to process items based on this logic

1. If the interarrival time is >= 50 Process time is 50

2. If interarrival time >40, process time is 40

3. If interarrival time is <30 process time is 30

I am trying to use global table method but not able to develop it

Software Version:

FlexSim 19.0.0

processor source logic interarrival times

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Answer 1 · 2024-10-17T07:36:02Z

Felix Möhlmann answered Oct 17 2024 at 7:36 AM Felix Möhlmann commented Oct 17 2024 at 10:06 AM

You can modify the code in the Inter-Arrivaltime field of the source to first determine the time value, then set the process time of the processor based on the generated value and only then return the value.

/**Custom Code*/
Object current = ownerobject(c);
 
double interTime = exponential(0, 10, getstream(current));
Object processor = ...;
if(interTime >= 50)
{
    getvarnode(processor, "cycletime") = 50;
}
else if(...)
{
    ...
}
else
{
    ...
}
return interTime;

· 2

Ali Asghar commented · Oct 17 2024 at 8:58 AM

Hi Felix, Thankyou for commenting but sorry I couldn't get it

Can you explain it

0 ·

Felix Möhlmann Ali Asghar commented · Oct 17 2024 at 10:06 AM

The code in the interarrival time field of a source by default looks like this.

Most of it is markup used to generate the GUI for the properties window. Without we are left with just this: The statistical distribution which generates the value which is returned as the 'result' of the code.

This is the only point where we can know the interarrival time. So we inject some more logic in the code. Instead of directly returning the value from the distribution, we assign it to a variable and use it to set the process time of a processor. At the end we still need to return the value, so FlexSim knows when to schedule the next creation event.

0 ·

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