topic Re: token errors in FlexSim Forum

token errors

luigi_f2 — Mon, 07 Jan 2019 15:55:39 GMT

[ FlexSim (other) ]

Hi,

I could not batch my order together based on my order no in the global table.

Thanks

Re: token errors

kari_payton — Mon, 07 Jan 2019 18:43:03 GMT

@Luigi F2 can you explain what you are wanting the model to do as far as the batching? The model stops because you don't have enough resources after you acquire the first one.

Re: token errors

JordanLJohnson — Tue, 08 Jan 2019 17:29:56 GMT

Here is a model that does what you want:

order-picking-by-orderno-v2.fsm

It has this process flow:

This flow creates one token per row of the global table. Then it uses a batch to merge tokens from the same order into a single order token. The order token acquires the operator.

Once the order token has an operator, it is ready to begin picking. To do picking, the order token creates one token per SKU. The SKU token creates one token per item of that SKU, which is the pick token.

Each pick token tries pull and item from the list that has the correct SKU. Once all pick tokens have pulled an item, the pick tokens are then batched into groups of up to 10 (the operator limit), and merged into a single token, which represents each trip the operator must make to pick the order.

For each trip, the trip token creates a task sequence that travels to and loads all the items, travels to the staging area, and then unloads all the items. Then, this task sequence is dispatched to the operator. Some orders will require multiple trips, and so will end up creating multiple trip tokens. The operator will do task sequences in the order they are received.

My guess is that you will want to modify and expand on this model. Before doing that, I recommend making sure you understand how this model works fully before proceeding.

Re: token errors

luigi_f2 — Wed, 09 Jan 2019 10:06:31 GMT

Hi Jordan,

Thank you for your clear explanation. I will look through every part to understand before proceeding to the next stage.

Greatly appreciated!

Re: token errors

luigi_f2 — Wed, 09 Jan 2019 16:16:39 GMT

Hi @jordan.johnson,

I have went through the model and made some changes, and I have noticed that the operator is not picking in sequence (example, from sku 1 - 10), he would pick the items from 1-10 in sequence. Currently, the operator is going all over the rack to pick the items.

Kindly advise,

Thank you.

Re: token errors

JordanLJohnson — Wed, 09 Jan 2019 16:20:05 GMT

Can you post your updated model?

Re: token errors

luigi_f2 — Thu, 10 Jan 2019 15:07:08 GMT

Hi @jordan.johnson,

Please advise on the operator's movement in this model, is it due to the A* navigation issue? As I want the operator to pick along the racks as I noticed that he is picking items from rack 2 but not physically at rack 2 in the model, would that affect on the distance he traveled?

Thank you.

16812-order-picking-by-orderno-v2.fsm

Re: token errors

JordanLJohnson — Thu, 10 Jan 2019 15:56:48 GMT

The issue is that the direction the racks face is important to A*. I rotated Rack2 180 degrees, and the operator now travels more sensibly:

order-picking-by-orderno-v3.fsm

Re: token errors

luigi_f2 — Thu, 10 Jan 2019 16:37:04 GMT

Hi @jordan.johnson,

Greatly appreciated! I see where I have went wrong, the racks' Z-coordinates were all towards the same direction thus, the operator could only pick from one direction.

Thank you!