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Calculating assembly line prime time

Creator
Creator

Hello!

 

I am trying to find the exact time that a product is assembled. ie the time it takes to prime the line until I get an output every cycle time.

 

So far, the only way I can do this is by manually calculating it with excel or, by watching the thoughput count and pausing the event controller when it reaches 1 - not that accurate though.

 

Thanks in advance!

 

keithkduffy

4 REPLIES 4
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Re: Calculating assembly line prime time

Siemens Phenom Siemens Phenom
Siemens Phenom

Hello Keithkduffy,

 

maybe you are interested in the average exit interval of parts in your model. The value is recorded by the Drain object. But which parameters can be changed?

 

Regards,

Peter

Re: Calculating assembly line prime time

Creator
Creator

Hi Peter,

 

Thanks for your reply!

 

What I am trying to do is calculate the time it takes for the first part to get through the line.

 

I am simulating an aircraft final assembly line so the lead time is quite big. (My cycle time for example is 96 hours).

 

But before I can get an output every 96 hours, I need to know how long it takes to get to that point.

 

Hope you can help !

 

Thanks,

 

keithkduffy

Re: Calculating assembly line prime time

Siemens Phenom Siemens Phenom
Siemens Phenom

Hi keithkduffy,

 

you could insert a variable of type time with name 'LeadTime'.

 

Then at the end of your line you can add an exit control and add something like this:

if LeadTime = 0 then
    LeadTime = EventController.SimTime - @.CreationTime;
end;
@.move; -- this line is important if you have a front triggered exit control

 

This code just checks if it's the first part (i.e. LeadTime still 0). If yes it calculates the time from the point where the MU was created (@.CreationTime) to the current time (EventController.SimTime).

 

This should be the time you're interested.

 

Regards,

Ralf

Regards,

Ralf
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Re: Calculating assembly line prime time

Creator
Creator

Hi Ralf,

 

I am still working on implementing this solution.

 

Thanks for your response and I will let you know how I get on with it.

 

Regards,

 

keithkduffy