topic How to calculate time for different number of items per orderlines? in FlexSim Forum

How to calculate time for different number of items per orderlines?

ioanna_c — Fri, 05 Mar 2021 10:48:40 GMT

[ FlexSim 19.2.4 ]

Hello, this is my model model-test11.fsm

I want to know, how Flexsim calculate the picking time of items collection. For example, i have code 117298 with quantity of 2 items for collection and picking time for these two items=61.02

in the other hand, i have code 134263 with quantity of 1 item for collection and picking time for one item=30.51

(To mention that picking time of collection include times such as set-up,scan position of type code etc.)

Can flexsim read these times and depending on number of items that operator has to collect per orderline, callculate the picking time in GlobalTable (Report) ? In first order, appear correctly the duration of picking but from there and down, wrong. Is there any setting or should i add something to ProcessFlow?

Thank you in advance!

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Fri, 05 Mar 2021 11:44:05 GMT

You've unchecked this delay's "Wait until complete" so the token passes through and writes to the table before the delay finishes.

I've changed that and added more times to the report so you can see how the time is split

You'll see that order 2 has no travel time. Watching the model you can see the operator just stands at Orders_Queue1 since the route you specify doesn't allow travel for the second order since you have a mandatory path that finishes at OrdersQueue1. I've added that 'fix' to your model - but again, your travel times are now unrealistic since you're no longer using the S-Path logic we provided.

model-test11jl.fsm

Re: How to calculate time for different number of items per orderlines?

ioanna_c — Fri, 05 Mar 2021 12:12:32 GMT

Thank you for your fast reply!

Yes, because I have performed various experiments to get to the right experiment in terms of time. In the above experiment, οperator has to collect all orders simultaneously and then must distinguish them in Orders_Queue1, follows s-path. But i notice time too that time is unrealistic. How can i do that? Is there something wrong in processFlow?

Thank you again!

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Fri, 05 Mar 2021 12:33:07 GMT

I sent you the solution where you don't use a fixed path in this post, but you seem to have selected the current solution in order to confirm some data you entered is used in the model. That data in its current form is worthless - there's a pick time per item of 30 seconds. If you'd put that in the operator load time it would be used - no need to change the model to report it. As they're fixed, the benefit and power of the model is finding the correct route that the operator would take along with the associated time, not confirming that 30s is used per pick - a value you told it to use.

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Fri, 05 Mar 2021 12:58:30 GMT

If you want to report per pick and use the correct travel then you need to associate the pick with the aisle bay and slot assuming that a single pick is never across two locations. Then use the method from the other model to pull the picks in the correct order - by aisle, bay and slot. You need to enable the addressing scheme of the racks in order to get the aisle, set the aisles in the Storage System gui for the racks, and you need to have the slot progression direction match the bay progression direction - all of which I added to the other model example.

Re: How to calculate time for different number of items per orderlines?

ioanna_c — Fri, 05 Mar 2021 13:00:54 GMT

I saw what you said before. From order 2 and after has no travel time. Operator just stands at Orders_Queue1. I preferred Mandatory Path, because i want to collect all orders together and then separate them in the end (Orders_Queue1) . I didnt found something else beyond this path.

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Fri, 05 Mar 2021 13:59:23 GMT

After you've finished picking you tell the operator to travel/unload to the Order_Queue1 - you don't need a mandatory path for that.

Re: How to calculate time for different number of items per orderlines?

ioanna_c — Fri, 05 Mar 2021 14:29:22 GMT

Yes, i understand what you said, but mandatory path is to force operator following specific route (s-path) to collect all orders and then unload them in Order_Queue1. Is there another way to collect all orders together following the s-path?

Re: How to calculate time for different number of items per orderlines?

ioanna_c — Sun, 07 Mar 2021 17:45:57 GMT

I understand. Thank you for your help!

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Mon, 08 Mar 2021 13:56:07 GMT

I've posted the latest model in this Answers post. Are you both working on the same project or is this meant to be coursework?

Re: How to calculate time for different number of items per orderlines?

ioanna_c — Mon, 08 Mar 2021 14:27:04 GMT

Hello,

Thank you for your correspondence!

We working about on the same project with different data. We have the permission from our professor for this, cause nobody in Greece teaches this simulation program. So, I am addressing here for the difficulties to complete my project.

Re: How to calculate time for different number of items per orderlines?

jason_lightfoot_adsk — Mon, 08 Mar 2021 15:11:37 GMT

Thanks for clarifying that.