collaborative purchasing

[Former Member]

Dear experts,

We have 5 different plants in our case. Some of the materials in those plants are purchased collectively. We have planning problem. Actually the purchasing batch size is calculated according to the cumulative requirements. For example if the batch size is 15000 for all plants but the requirements is 10000 for all plants. If we make cumulative purchasing 60000 purc req must be planned but according to the mrp 15000 x 5000 = 75000 purc req is created.  We do not want to create a new plant for purchasing or transfer requirements to a single plant. What do you offer for this condition.

[Former Member]

As you're already planning for all the plants cumulatively, then I hope you already using scope of planning to group together the plants. What do you mean by batch size is 15000? check MRP 1 view and lot size whether you maintained fixed lot size 15000. If you want the batch size to be 10000 why dont you change it for all the plants?

[Former Member]

think as 15000 as min lot size that can be opened to vendor. What do you mean scope of planning to group together the plants.

[Former Member]

scope of planning is used to run MRP for different plants collectively. You define the "scope of planning" by grouping different plants or MRP area

in MD01, you run MRP for all the plants at a time. It needs some config and technical settings as this planning should be executed in parallel mode.

So I think, if you use this functionality with collective requirement indicator you may achieve your requirement of creating one PR for all the plants. I dint try this so you test it.

http://help.sap.com/saphelp_46c/helpdata/en/35/7187e286c2223ae10000009b38f984/content.htm

http://help.sap.com/saphelp_46c/helpdata/en/f4/7d2eff44af11d182b40000e829fbfe/content.htm

http://scn.sap.com/thread/1006030

[Former Member]

scope of planning seems to be a job running mrp for different plants in sequence. so my requirement for cumulative purch req does not fit. collective req indicator collects the req in a single plant

[Former Member]

it sounds not possible in SAP atleast in standard.. lets think logically if we want the system to create a single PR with five line items for different plant splitting the quantity equally.... seems like its an overhead for the system.. For example.. we already know one standard request which araises from every client.. i.e system should create a single PR for all the materials whne we run the MRP.. i.e system should group together some materials in a plant and create single PR.. but this is not possible in SAP... likewise your requirement is also not possible in SAP... You may need to try the workarounds whick you already mentioned but dont like or some enhancements or finally you need to convince the client.

If you find any solution for this I am glad to hear that.

[former_member182609]

I guess the collective purchasing process not works in normal system.The collective process concept available in SAP IS retail system.Do the planning for your requirements as above said

[BijayKumarBarik]

Hi,

Use field Individual/coll. and enter 2 {Collective requirements only} in material master in MRP-4 view.
But what MRP Type and Lot Size (lot sizing procedure) you are using in materil master!

You can have MRP Group for each plant or one MRP group for all five plant!

How runing MRP in MD01 or MD03?

If its PD where resevation taken into account!

If reorder point planning (type of consumption based planning) when you run MRP, the system will calculate the net requirement which is /are stock available at plant including any safety stock and outstanding Purchase Orders.  If the sum of all these stock available is/are less than the reorder point, there is a material shortage and so MRP run create a purchase requisition according to the lot sizing procedure defined on the material master.

Regards,

Biju K

[Former Member]

We use PD, and parameters min lot size and max lot size, rounding value and safety stock. The problem is that I can define these parameters for each plant and all plants calculate the purc req individually. But we want to define theese parameters and open a purch req collectively for all plants.

[BijayKumarBarik]

Hi,

When you use MRP type PD, then parameters min lot size and max lot size not required. You can use  MRP type VB with min lot size and max lot size with reorder point.

Better check links and exlpore use of MRP type and do design your procurement process.

http://help.sap.com/saphelp_45b/helpdata/en/18/e92c7dd435d1118b3f0060b03ca329/frameset.htm

http://www.sapsword.com/home/learn-sap-pp/sap-mrp/sap-mrp-functionality/step-2---sap-mrp-material-ma...

Regards,

Biju K