Grouping
Use
You can group requirements from WBS elements belonging to one project or from WBS elements belonging to several projects for the purpose of MRP.
The joint planning and procurement of material components required for a project leads to improved logistic processes and to savings due to larger lot sizes.
You can facilitate requirements consumption and stock settlement for individual material components by assigning the components to other WBS elements in the component assignment detail screen or in transfer control for BOM transfer .
Prerequisites
When you create the projects involved, you must set the stock indicator on the Control
tab page of the project definition.
You must have assigned the materials that are to grouped for MRP to a MRP group that is intended for grouping in the material master.
To make sure that MRP really only creates one procurement element for all the requirements for one material and grouping WBS element,
Enter a periodic lot size (for instance MB - monthly lot size
) in the material master.
In Customizing for material requirements planning, work step Check lot-sizing procedure
, set the MTO lot size
indicator to the value 2 (
Lot
size as in planning horizon)
for the periodic lot sizes.
Features
In grouping the system groups several stock owners (WBS elements) together in one Grouping WBS element
MRP creates procurement elements (planned orders or purchase requisitions) for the requirements from the grouped WBS elements. These procurement elements are account assigned to the grouping WBS element.
The stock in the grouping WBS element contains all materials that are both intended for requirements grouping, and required by the individual WBS elements.
The procurement costs are settled to the grouping WBS element. When the procured material is withdrawn, the costs are posted to the original source of the requirements.
The different forms of grouping, which differ in their complexity, are described below:
If you change the grouping WBS element when there are already requirements in the project, you must be aware that the requirements in the project will then be grouped on different WBS elements.
Manually Assigning WBS Elements to Several Grouping WBS Elements
You can also assign WBS elements from one or more projects manually to different grouping WBS elements. Choose Logistics
or Accounting
→
Project System
→
Materia
l →
Planning
→
Requirements grouping
→ Assign WBS elements individually.
Assigning Materials to Different Grouping WBS Elements According to the MRP Group
If you want to assign the material components in one WBS element to different grouping WBS elements, you can do so by using the combination of plant and MRP group. To do so, the grouping WBS elements must have the characteristic value Grouping WBS element for selected MRP groups
(2).
To assign the combination of MRP group and plant to the grouping WBS elements, choose Logistics
or Accounting
→
Project System
→
Materia
l →
Planning
→
Requirements grouping
→
Assign MRP groups.
Activities
In Customizing for the Project System
activate MRP for grouping by choosing Material
→ Procurement
→ Activate MRP Groups for Requirements Grouping.
If necessary, create special MRP groups in Customizing for Requirements Planning
beforehand.
In their material masters assign the material components, whose requirements you want to group, to one of the MRP groups that is intended for grouping.
Define Grouping WBS Elements for the project or projects.
If you are not working with automatic requirements grouping, assign WBS elements, whose requirements you want to group, to the grouping WBS elements manually.
If you want to group additional requirements depending on the material, assign the grouping WBS elements valid combinations of MRP group and plant.
For more information on special scenarios from the MRP point of view, see Material Planning and Requirements Grouping