Low level code is widely used in MRP run.It comes from BOM.We can check it in MM03 MRP3 tab page.
Low-level code is used in MRP to determine which material run at first.The lowest level materail runs at last.
Application Area – ERP-PP
Description
Function module CS_BOM_EXPL_MAT_V2 is used for BOM explosion for a given material. It belongs to function group CSS4 – BOM explosions. This function module can explose multi-level BOM with a given validation date.
You need to specify necessary input parameters to call this function module, such as CAPID – App ID, DATUV – Validation date, MEHRS – Multi-level, MTNRV – Material number, STLAL – alternate, STLAN – BOM usage.
Some useful tables are also listed here.
TABLES: MARA, "Master Data MAKT, "Matl Desc. MARC, "Plant Data for Matl. MAST, "Bom to material link STKO, "Bom Header STPO. "Bom Item
Some material is the component of the BOM and some material is the final product and is linked to a BOM. Below is logic to check whether a material is a component or is linked to a BOM.
First, check table STPO (BOM item). If the material name is in field STPO-IDNRK(BOM component), it means the material is part of the BOM.
Second, check table MAST(Material to BOM Link). If the material is in MAST table, it means this material is linked to a BOM.
Tables:
MARA – General Material Data
MAST – Material to BOM Link
STKO – BOM Header
STPO – BOM item