MRP run

[rajesh_sutar2]

Hi PP Experts,

Can anybody tell me please When we run MRP for material, which data checks system step by step.

[rupesh_brahmankar3 · Accepted solution]

Dear,

Steps involved in an MRP run,

1.Checking the Planning file entry

2.Net Requirement calculation,

3.Calculation of exact procurement quantity (Lot Sizing),

4.Procurement type-->scheduling.

5. Determining procuement proposal

6.BOM Explosion & determining the dependent Requirements.

7. Creation of exception messages

Custmizing: activate the MRP in OMDU transaction.

Customized all plant paramaters for MRP in OPPQ tramsaction.

In Material master you should have valid MRP type like PD with lot sizing procedure.

Run MRP from MD02 or MD01 with required parameters and check resuls in MD05/MD04

Please refer this link also,

[MRP Procedure|]

Hope it will help you.

Regards,

R.Brahmankar

[Former Member]

Hi Raja,

Frequency of MRP run completely depends on business requirement and differs from company to company. There are lot of factors which affect this. Number of materials that needs to be planned, how frequently your plan changes etc affect the MRP run.

You can run MRP in background as well as foreground. Usually where large number of materials has to be planned MRP run is executed in background.

During MRP run system checks the planning file entries. A planning file entry is created every time a material undergoes MRP related change. This change can be a newly created sales order, a purchase requisition, purchase order, dependent requirement or simply PIR. Depending upon your planning strategy system will plan the material that has been marked in planning file. If requirement for a material exists, system will explode BOM (can be single level or multi level depending upon MRP run) and plan for the procurement of header material and components. System will consider inhouse production time / planned delivery time and give procurement proposal according to procurement type maintained in Material master.

Please go thru the following link to understand more about MRP.

http://help.sap.com/saphelp_46C/helpdata/EN/f4/7d3f9344af11d182b40000e829fbfe/frameset.htm

Hope this helps !!!

Cheers,

Himanshu

[muthusamy_sankaran]

Hi,

Normally MRP run will happen daily in background mode by tcode MDBT.

MRP run will change depends on company applications.

MD01 Online MRP Run

MDBT As Background Job

MD40 Online MPS Run

__________________________

Other Help ful T.code for MRP

MD41 Single-Item, Multi-Level

MD42 Single-Item, Single-Level

MD43 Single-Item, Inteactive

MD50 Single-Item, Sales Order

MD02 Single-Item, Multi-Level

MD03 Single-Item, Single-Level

REgards,

Sankaran

[rajesh_sutar2]

I mean to lot size,strategy,availabilty check.

[former_member196398]

Raja,

When MRP is run following happens in sequence,

1. Net Requirment Calculation.

The system checks whether it is possible to cover requirements with the plant stock and fixed receipts already planned. In the case of a shortage the system creates a procurement proposal.

2. Calculating Procurement Quantity.

3. Scheduling - Determining dates for the procurement quantity.

4. Determining Procurement type. Like Inhouse or External Procurement, should consider Quota arrangement etc...

5. BOM Explosion if it is an assembly. - Creation of dependent requirements. For child components Steps 1 to 4.

6. Finally execption messages if any.

Regards,

Prasobh

[rajesh_sutar2]

Thanking all.

[former_member196398]

Raja,

Thanks buddy for your rewards,

Prasobh