Operator traveling to specific rack slot along walk path (w/o item in the rack)

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Rahul R asked Dec 12, '22 Felix Möhlmann answered Dec 12, '22

Operator traveling to specific rack slot along walk path (w/o item in the rack)

I am trying to model picking an stowing at a warehouse with 600-800K inventory units. Each inventory unit need not be tracked and hence I would like to model pickers going to random slots along their pick path and use delays to simulate picking action. With some help from this forum, I am able to model operator going to pick a specific item in the rack. Now I am trying to do the same without modeling items in the rack. I will maintain stat on total inventory and storage cube in labels or variables.

My initial idea has been picking the required number of random slots in the racks, ordering them by AisleID, bayID and slotID. Then using travel to location activity to make operator go to these slots one after the other before heading to drop location.

Is there a better way to model this scenario?

@Felix Möhlmann @Jason Lightfoot

Model with picking items explicitly - Rack_test2.fsm

Model going to random slot location - Rack_test4.fsm

Software Version:

FlexSim 22.2.4

rack warehouse

rack-test2.fsm (68.1 KiB)

rack-test4.fsm (49.0 KiB)

Answer 1 · 2022-12-12T08:25:17Z

Felix Möhlmann answered Dec 12, '22

That is pretty much how I would model that as well. Similar to the other model, you can again use a partitioned list you push the pulled slots to and then pull them in ascending order by the bayID (or other IDs).

One important note: The location you get from the slot is given in the coordinate system of the rack. To get the global coordinates, you have to project the location vector onto the model coordinate system.

rack-test4_1.fsm

1670833439522.png (30.4 KiB)

1670833500436.png (6.1 KiB)

rack-test4-1.fsm (54.0 KiB)

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