Lot Sizes in MRP (SAP Library - Production Planning and Control)

Lot Sizes in MRP

Use

During MRP, the system creates procurement proposals based on your lot sizes if there is a stock shortage. By determining lot sizes you can plan optimal quantities per procurement proposal and thus specifically cover your requirements. The planning of lot sizes influences the planning of the available capacity, and the planning of the production or procurement costs. With AFS you can plan the quantities to be procured at SKU level.

Features

The table below describes to what extent AFS supports the usage of SAP standard and AFS lot-sizing procedures when they are combined with MRP-relevant functions. This clearly shows which settings you can maintain at material level and / or at SKU level (material master) and their interaction with the lot-sizing procedures.

	Lot-sizing procedure
MRP-relevant functions	Exact	Fixed	Periodic	Periodic, according to the planning calendar	Requirements Distribution Ratio	SKU Group Procedure 1	SKU Group Procedure 2
Material level
Minimum lot size	x	(-)	x	x	(-)	(-)	(-)
Maximum lot size	x	(-)	x	x	x	x	x
Rounding value	x	(-)	x	x	x	x	x
Rounding profile	x	(-)	x	x	x	x	x
Safety stock	x	x	x	x	x	x	x
Assembly scrap	x	x	x	x	x	x	x
Range of coverage profile	x	x	x	x	x	x	x
SKU level
Minimum lot size	x	(-)	x	x	(-)	(-)	(-)
Rounding value	x	(-)	x	x	x	x	x
Safety stock	x	x	x	x	x	x	x
Single grid value	x	x	x	x	(-)	(-)	(-)
SKU groups	(-)	(-)	(-)	(-)	(-)	x	x

x means it is supported, (-) is not supported, ---- SAP standard; ---- AFS

Note

We recommend that you use the maximum lot size for the AFS-specific lot-sizing procedures.

AFS Restrictions

In the SAP standard Customizing you can determine an MRP-relevant part of the safety stock that is included in the MRP calculation and is thus available for the requirements coverage. Use this function to prevent the system from unnecessarily creating procurement proposals to satisfy an insignificant stock shortage. This function is not supported by AFS.