SNP Optimizer changing PDS in subsequent buckets

[Former Member]

Hi,

I have the following requirement.

Scenario: I have a material which can be produced on multiple resources in a plant, these resources are shared by multiple products as well. For a particular material multiple resources will have same throughput and same production cost. based on cost optimization if optimizer loads a material on a resource it should not change the resource in subsequent buckets.

Issue: if for a material "material1" optimizer chooses resource RES1 it should continue to load the RES1 in the subsequent buckets, it should not change the resource for "material1".

We tried to include the setup in the SNP optimizer run, however for a plant there are very high number of products sharing multiple lines which increases the optimizer run time.

Request you to please share your suggestions to solve this issue.

Thanks in advance for your help,

[Former Member]

Hi Kovil & Debashis,

Thanks for your reply,

we are doing the same, created multiple PDS for a product based on multiple routing. This is why we are facing the problem, optimizer is randomly picking the PDS even though the capacity is available on the current PDS. We could have handled this issue in PPDS by creating alternate resource in PDS and multiple PDS for SNP through some development if the through put would have been same.

Here through put is different so we cant take that route.

I think this issue can only be handled in optimizer.

More over we are also using actual production cost so we cant even give the priority to a resource through cost.

Need to use setup in SNP optimizer (however it is taking very long time and giving inconsistent results if the material set is bigger) or add a constraint in optimizer as "not to change resource if a resource is picked".

Kind Regards,

Sourabh Pujari

[former_member189901]

Hii Sourabh,

SNP Optimizer run on different capacity constraints..

1. production capacity

2. Transportation capacity

3. Handling Capacity

4. storage capacity

etc..

Sp please check your Optimizer profile, what you have selected.

It my happen that different resource selected because of capacity not available on those buckets. on those resources....

Regards

Debashis.

[Former Member]

Hi Debashis,

Thanks for your reply.

We are only considering "production capacity" as discrete constraint in optimizer profile.

Yes I have seen different resources being picked up due to capacity not available based on cost, however this is not we want. If a particular material is loaded on a resource it should not change the resource as setup costs are very high.

And above all the most important issue which we saw is resources are different in subsequent buckets even though the capacity is available.

Thanks in advance for help,

Kind Regards

Sourabh Pujari

[former_member189901]

Hii Sourabh,

How you  have assigned different resources to The Product, Is it through Different PDS( different routing for Different resources ) Or  by Alternative sequence in the routing ?

Try to use two PDS(Two source of supply) and then put different procurement priority, and then  assign highest cost tho source of supply, which you don't want to pick up.

So in this way only the first resource will selected in every bucket.

Regards

Debashis

[Former Member]

Hi Sourabh,

I was just wondering why don't you club all these resources as one MULTI-mixed resource.

Also Optimizer will not be able to do this as it does not look at which resources is getting picked when the costs are same. I twill try to arrive at optimized solution and based on which the resources can change. What you can do is the automatic generation of the costs based on Priorities.

We faced similar issue with the product mix in the daily planning runs at one of our clients and showed him that optimizer by nature lacks the ability to give preferential treatment to similarly placed materials, resources etc and then changed over to CTM successfully to achieve the results.

Let me know if this answer helps.

Regards,

Kovil Nimje

[Former Member]

Hi Kovil,

Thanks for your reply, here we want to use setup matrix for PPDS hence we cannot use MULIT-mixed resource.

Here we are also trying to achieve optimization based on actual costs this eliminate the possibility of using CTM or automatic generation of cost based on priority.

Can we have alternate SNP PDS?

Thanks in advance for your help,

Kind Regards,

Sourabh Pujari

[Former Member]

Hi Sourabh,

Yes, definitely you can have alternate PDS meaning two PDS for the product based on two routings . That is what I do. As far as I know, alternate resources are not supported in single PDS and hence workaround. Also automatic generation is good option.

Regards,

Kovil Nimje