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Alejandro Ulises TP avatar image
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Alejandro Ulises TP asked Matthew Gillespie commented

Problem with sending items in process flow

item-does-not-go-to-processors.png

I'm having a problem I cant solve. The process flow is supposed to send items once the processors are available. Approximately at the 950 seconds of the simulation an item flow is hold in the DP1 but does not send the item flow to the processors that are available (odd processors)! It just releases the item flow once the event trigger of the even processors is activated.

It happens every time an item flow is waiting in DP1.

Anyone could guide me with this problem?

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process flowdecision pointsitem flow
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1 Answer

Matthew Gillespie avatar image
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Matthew Gillespie answered Matthew Gillespie commented

The issue is with your acquire logic. First you try to acquire an Odd processor, but if that's not immediately available then you try to acquire an Even processor. But if that's not available then you send the item to DP12, but you wait until there are less than 2 boxes at DP12.

So your current logic makes it so that a box that arrives when all the Odd processors are busy will never get to go to an Odd processor.

Take a look at this updated model where I first try to acquire an Odd processor, then a DP12 spot, and then if neither is available I wait for either an Odd processor or a DP12 spot to open up and then I send the item to whichever one opens up first.

waitforopening.fsm


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Alejandro Ulises TP avatar image Alejandro Ulises TP commented ·

I'm really impressed with your logic Matthew, thank you so much.

I'm still having problems with the process flow, do you recommend any course to be better at this subject?

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Matthew Gillespie avatar image Matthew Gillespie ♦♦ Alejandro Ulises TP commented ·

As far as actual courses we offer periodic 3-day training classes, see https://www.flexsim.com/training/ for more info.

If you haven't gone through the tutorials yet those are a good resource, https://docs.flexsim.com/en/19.2/Tutorials/Introduction/ (or you can find them within the software in the User Manual).

Other than that I just recommend building models and learning as you go. Ask questions on this site if you want to know how to do something specific or if it's not working the way you want.

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