Question on the average stay time of individual item with them being combined

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Kevin A2 asked Mar 29, '18 Kevin A2 commented Mar 30, '18

Question on the average stay time of individual item with them being combined

Hi, in my simulation model, there is a combiner which combines items (boxes) into a pallet before items leaving at the sink. The items (boxes) are created at different times, but they leaves at the same time as they are on the same pallet. I want to know the average stay time of these items (boxes) in the system (from the moment it is created, to the moment it exits at the sink), how can I do this?

https://answers.flexsim.com/questions/23239/tracking-staytime-of-two-different-itemtypes.html

I've read the above example, but it seems that this method can only get the creation time of the pallet, but not the items (boxes) itself

Thanks!

Software Version:

FlexSim 17.2.5

stay time

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Answer 1 · 2018-03-30T12:20:05Z

Joerg Vogel answered Mar 30, '18 Kevin A2 commented Mar 30, '18

The main problem is how you interpret the variable item inside the function getcreationtime(item).

If you look into the manual of the function, you can see that item is just a reference or pointer to the object, you want to get the creation time on. A pallet consists of several items stacked or packed on it. You need a reference to each item on the pallet to get the creation time. Those items are subnodes of the pallet as long as you haven't joined them in the combiner. The first item on the pallet

Object stackedItem1 = item.subnodes[1];

You can get with this reference the creation time.

double modelStayTime = time() - getcreationtime(stackedItem1);

· 3

5 |100000

Attachments: Up to 12 attachments (including images) can be used with a maximum of 23.8 MiB each and 47.7 MiB total.

Kevin A2 commented · Mar 30, 2018 at 01:32 PM

Thanks, this really helps.

However, in my model the no. of items on a pallet could be different. Is there a command for counting the no. of items on a pallet? (no. of subnodes of the pallet?) So that I can have a proper loop to get the stay time of all the items on a pallet without error. Thank you very much!

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Joerg Vogel Kevin A2 commented · Mar 30, 2018 at 01:38 PM

int itemsOnPallet = item.subnodes.length;

Please look into the manual

References>Coding in FlexSim > Flexscript Class Reference

Class type "treenode" Properties "subnodes"

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Kevin A2 Joerg Vogel commented · Mar 30, 2018 at 01:52 PM

Thank you very much!

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