Using Global Variable for Processing Time Variation - plz help!

Hello!

We are making a basic assembly line model (please refer attached model) with 20 processors.

Each of the processors has a processing time (P) which is triangularly varying over a range.

Now, we need to build a logic USING A GLOBAL VARIABLE where :-

1) when P is < or = 80 secs, then the item (box) moves into the next processor at 80 secs.

2) when P > 80 secs, then the item (box) moves into the next processor at 160 secs.

However, I can't much way ahead into this as I am not accustomed to using Flexscript commands.

With regard to our simple model, any advice as to how to approach to build this logic into the model is seriously appreciated!

Thank you very much...

hmmm....

maybe you upload a very simple model, too. And maybe you look at another thread more carefully. To give you a hint for the process time:
declare a double variable, which is initiated with your statistical distribution;
compare this local variable with the global variable in a if-statement;
if the result is true return the global variable;
else return the double global variable;
or return vice versa.

Jörg

Thank you very much Mr. Vogel...I would be frank with you to accept that I am not at all accustomed to Flexsim's FlexScript coding and hence I am not sure how to build the above-mentioned logic into my model. I am more accustomed with the drop-down GUI-s and hence I am trying to find a way out of this just using the Triggers Tab mainly and concepts of Global Table.

Also, we are thinking of a different approach in this respect where we are trying to make the robots between processors only pickup boxes from the processors every 80 seconds only. In that way, I feel we might be able to find a way out of this. But again, I am trying my best with different permutations of the Robot properties but till now, no luck!

I have NOW attached a very simple model of a plant flow line here which might make it a bit easier for you to understand my intentions.

Thank you for your help again!

hmmmm...

without any knowledge of writing a source code the problem seems without any solution. But perhaps mathematics will help you:
The function "ceil" rounds up to the next integer.
Then is the Return Value in the Process Time:

ceil( "random value of a triangular distribution" divided by the global variable) multiplied with the global variable

Jörg

Sorry to request you again Mr. Vogel...another approach comes to my mind...is it possible to open and close the input and output ports every 80 secs?

I have also attached a simple model with 2 processors. The processing time for each processor varies over a triangular distribution.

As I said earlier, I intend to use SendMessage option if possible here but not sure how.

Thanks!

Very good,

messages are good to create your own discrete events. Flexsim is a program that works with events. Even if you don't want to write your own source code, the approach might work. It would be much simplier, if you add a source code in the OnMessage-Trigger by calling this trigger with a delayedmessage message again. But you can sendmessage alos from other event-triggers. It works.
Try your concepts first in very simple and small models.

Jörg

Originally Posted by Gaurav Majumdar

Thank you very much Mr. Vogel...I would be frank with you to accept that I am not at all accustomed to Flexsim's FlexScript coding and hence I am not sure how to build the above-mentioned logic into my model. I am more accustomed with the drop-down GUI-s and hence I am trying to find a way out of this just using the Triggers Tab mainly and concepts of Global Table.

Also, we are thinking of a different approach in this respect where we are trying to make the robots between processors only pickup boxes from the processors every 80 seconds only. In that way, I feel we might be able to find a way out of this. But again, I am trying my best with different permutations of the Robot properties but till now, no luck!

I have NOW attached a very simple model of a plant flow line here which might make it a bit easier for you to understand my intentions.

Thank you for your help again!

I can understand where you are coming from. When I began using Flexsim I had similar issues with flexscript. But its rather simple. You can write a pretty decent code with if else and for statements. I would suggest you to go through Flexsim's user manual specially the section called flexsim coding. Its a gr8 place to start with for someone new to flexscript.