How to calculate the different time per order?

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Ioanna C asked Feb 28 2021 at 11:12 AM Jason Lightfoot edited Dec 19 2023 at 12:23 PM

How to calculate the different time per order?

Hello,

This is my model T4.fsm

I have 6 orders. This orders has different orderlines and different number of items per orderline. For the picker we have two major time, the walking and picking time. As far the picking time is variable, depends on of the number of orderlines and number of items per orderline. How is possible Flexsim to calculate dynamic the different picking time according to the orderlines and the items per orderlines for each order?

Thank you in advance!

Software Version:

FlexSim 19.2.4

flexsim 19.2.4 calculate times pickingtime perordeline s-plan

t4.fsm (179.1 KiB)

· 2

Joerg Vogel commented · Feb 28 2021 at 12:06 PM

I think that is the task of FlexSim. FlexSim tests in several simulation runs how long it takes to fulfill the orders. You can try to implement a forecast mechanism into the logic to let FlexSim run only once and misuse FlexSim as an animation tool.But why would you do this, if FlexSim finds the times for you.

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Jason Lightfoot ♦♦ Joerg Vogel commented · Feb 28 2021 at 1:57 PM

If the pick times vary a lot you might want to know the lead time so you can pick just-in-time and minimize picked orders waiting or use that information to load balance across the pickers. But is this what's being asked here?

Is it more that the model creates similar pick times since it's implemented as a fixed path to get the S-path instead of generating a more realistic pick sequence and then letting the operators freely travel to the pick locations.

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Answer 1 · 2021-02-28T21:19:18Z

Jason Lightfoot answered Feb 28 2021 at 9:19 PM Jason Lightfoot commented Mar 02 2021 at 11:51 PM

@Ioanna Cri If you put a load time on the operator then that will take effect for every item that gets picked so picking 10 items takes 10 times the time to pick 1 item. There are a number of ways this could be modified.

I was concerned looking at your model though that you had not got the shortest travel distance while using an S-Path picking sequence. I've put that into your model here so that you can see the impact of that. I removed the preferred path since once it's sequenced you should be able to rely on Astart finding the best/shortest path.

sPlanPickSequence.fsm

splanpicksequence.fsm (183.6 KiB)

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Ioanna C commented · Mar 01 2021 at 2:07 PM

@jason.lightfoot Thank you for your quickly reply!

Sorry, maybe i wasnt understandable, what i meant is: In this model, we are trying to simulate the picking process in a warehouse. We take into consideration 2 specific times: a) the walking/travelling time of the picker which is set to 0,5m/sec and b) the picking time which based on the literature is set to 15 secs per item and includes the scanning of the barcode of the rack, picking/collecting the product, scan the product, and put the product into a roll cage. What I would like to ask is as follows: If a picker needs to pick 2 items from a specific position of a rack, how can FlexSim calculate the amount of time needed (ie. in this case it should be 30 secs)? What I am searching is if we can insert some standard times and based on them to be able to calculate the total amount of time needed to collect an order.

Thank you in advance!

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Jason Lightfoot ♦♦ Ioanna C commented · Mar 01 2021 at 2:16 PM

The item is loaded by this activity in the process flow:

But it has no time associated with it, right? So as I said you need to enter the load time per item on the operator:

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1614608118534.png (5.9 KiB)

1614608203692.png (14.3 KiB)

Ioanna C Jason Lightfoot ♦♦ commented · Mar 01 2021 at 3:06 PM

In this case (first photo) if i had a code with 2 items, it will calculate 2items*15sec per item?

or should i put the second option in second photo, because in Global Table-Picking List in 2nd column (Quantity) contains all items of each code which different from each other.

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ph1.png (180.8 KiB)

6753d5cc-fe57-457e-b253-c15c28b662a7.jpeg (95.6 KiB)

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