MRP Concept in SAP

MRP is the planning tool in SAP which will look at all aspects of a material and is highly based upon the master data of the material.
MRP looks at current inventory, current requirements, and open purchase requisition/orders and so on. So if a material is required to satisfy a sales order and there is no inventory, MRP will create a planned order if the item is to be produced in house. This planned order can then be converted to a production order by the master scheduler.

If the item is to be procured, then MRP will create a purchase requisition which the Buyer will convert to a purchase order. This is just one scenario, the system is highly configurable and will do pretty much whatever you tell based on config and master data.

Read more

Material Replenishment Planning Guide

This process is used to run the replenishment requirement of all materials at a plant.  Each plant will determine the frequency of running MRP – every other day, once a week.  The purpose of MRP is to ensure the right material arrives at the right place at the right time.  The MRP run is used to automatically generate planned orders or purchase requisitions enabling the replenishment of materials depleted by consumption and the planning of known requirements. The system tries to achieve a balance between optimizing needed materials and minimizing costs by keeping inventory levels at a minimum and having no stock outages.

Read more

Planned Independet Requirement

Definition:

Independent requirements and dependent requirements are the two main types of requirements you encounter when configuring SAP planning. This is what they are: 

Planned Independent Requirements (PIR)

Planned Independent Requirements are planned production or sales quantities that are based on some sort of forecast procedure (e.g. Material Forecast or S&OP procedure). These numbers are used in MRP to calculate procurement and/or production quantities for a material.

Read more

Difference between MRP&MPS

Master Production Schedule (MPS) :
MPS operates within only one level of the BOM, While MRP can be utilized throughout all levels of a material?s BOM. If a MPS is run on a material, the necessary orders are planned at that level. Dependent requirements (if any) are placed on the next BOM level down, and then the process stops.

Read more