Leave Queue if stats_staytime>specific.time

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Brayan Leonardo Gil Guevara asked Jul 26, '16 Brayan Leonardo Gil Guevara edited Jul 28, '16

Leave Queue if stats_staytime>specific.time

Hi,

I need some help, I guess some code is required in order for me to do what I want. An item arrives to Queue1, there's a processor as next stop, but the process time follows an specific distribution. So, items in Queue1 can and will stay there for some x time.units. I created a label, and I want to set the stats_staytime in that label for every flowitem, but I also want to use said time to make some decisions. If stats_staytime>300(timeunits) the item must leave Queue1.

How can I do this in FlexSim?

Thank you in advanced for your reply.

Software Version:

FlexSim 7.7.4

queue time staytime stats

Answer 1 · 2016-07-26T23:03:26Z

Ben Wilson answered Jul 26, '16 Brayan Leonardo Gil Guevara edited Jul 28, '16

Please see the attached sample model.

In this model, the first queue has several triggers defined:

On Entry - a message is sent from the item to the queue in 300 seconds
On Message - if the sender (the item) is still inside the queue, release it out port two to the 2nd queue
On Exit - save the item's stay time in the first queue to the item's qStayTime label to use this data for something else later on

I think these 3 triggers will do everything you're asking for.

There is no other custom behavior set on any of the other objects.

2016-07-26-17-03-47-flexsim-2016-samplemodelfsm.png (59.3 KiB)

samplemodel.fsm (16.0 KiB)

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Brayan Leonardo Gil Guevara commented · Jul 28, 2016 at 11:23 PM

Thank you so much for this answer @Ben Wilson. Is just what I am looking for.!! but there's something i'd like to try now... The "Send to port:" is set to 1, in the Queue1, but, what if I have more than 1 Processor conneted, and i'd like to send the item to a random available port from an specific list, ignoring queue2.

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Answer 2 · 2016-07-27T01:37:16Z

jing.c answered Jul 27, '16 Brayan Leonardo Gil Guevara commented Jul 28, '16

Hi Brayan

I tried to use List Tool to solve your question, and please see the attached model, you can do it by follow steps:

1. Add a new Item List in ToolBox (you can find it in Global List)

2. Add a Time Interval in Back order Reevaluation Events in Back Order Tab, and set the Time Interval to 1 or less based on how strict the staytime analysis.

3. Choose UseList > push to item list in Queue3's sendtoport trigger option

4. Check Pull in Processor4 and choose UseList > pull from item list in Pull Strategy and Query should set ORDER BY age DESC

5. Check Pull in Queue5 and choose UseList > pull from item list in Pull Strategy and Query should set WHERE age > 50 (50 is the specific time example you can change it by your request)

leavlqueuebyspecifictime-chjv16.fsm

leavlqueuebyspecifictime-chjv16.fsm (22.3 KiB)

· 1

Brayan Leonardo Gil Guevara commented · Jul 28, 2016 at 11:24 PM

Thank you for your answer. @jing.chen. It works great.

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