Multi-Plant Planning 
You use this process if you want to plan and then produce a finished product in different plants. From a business point of view, this planning method makes sense if the planning plant and the production plant are located close to each other, as transport costs from one plant to the other are not taken into account.
Production in an alternative plant is controlled in MRP using a special procurement key. You assign the special procurement key to the material in the material master record for the planning plant.
You can use multi-plant planning irrespective of whether you use repetitive manufacturing for make-to-stock/make-to-order production or for a KANBAN material.
Repetitive manufacturing does not support functions for transferring a material between two plants or for withdrawing a material from one plant where it is not produced.
Prerequisites
Customizing
In Customizing for MRP, you must have defined a special procurement key for production in an alternative plant in the activity Define Special Procurement Key.
Planning plant
In the material master record of the assembly, you must maintain a special procurement key for the planning plant for production in an alternative plant.
Production plant
In the material master record of the assembly, you must create a production version for the production plant, containing a BOM and the production line for the production plant.
Process
First, you carry out the planning run in one or in several planning plants. Here, the system creates planned orders which contain the planning plant and in the production plant. Then you carry out the planning run in the production plant. If you selected an alternative selection indicator in the MRP views of the material master record which selects according to the production version, the planned orders are scheduled directly to a production line. If not, you then have to access the planning table and assign the planned orders to a line manually.
Access the planning table for repetitive manufacturing. The planning table now displays a separate row for every planning plant that deviates from the production plant. Thus, you can assign the planned orders that have not yet been assigned to a production line or you can create new planned orders.
Once you have produced the assembly, you backflush for every planning plant. Here, the system posts the goods receipt for the assembly in the planning plant and backflushes the components in the production plant. It determines the production plant automatically via the special procurement key. Then the planned orders are reduced and, if necessary, the production costs are updated to the product cost collector.
Graphic display
