Supply Chain Management with APO

4.6 Dependent Demand in Demand Planning 73
The other scenario is the use of sets (mainly in consumer goods industries),
where different products are combined to a new product number. Here the
information of the dependent demand is needed to achieve an overview of
the total demand for some products, especially to analyse and to plan cannibalisation
effects.
The information about the dependent demand is provided either by
uploading this information from SNP (or from PP/DS) or by calculating it
within DP.
• Uploading Dependent Demand from Order Live Cache
Assuming that SNP or PP/DS is used, the dependent demand is calculated
during MRP anyhow. It is possible to transfer the categories for dependent
demand (EL for SNP orders, AY for PP/DS orders) for the relevant products
to DP as described in chapter 4.9.3.
The advantage of this solution is that no additional master data has to be
maintained and no additional planning steps are required. The disadvantage
however is that the dependent demand is available in DP only after the
release of the independent demand and the MRP run. This implies that it is
not possible to have a short cycle time to receive the results and that it is
not possible to check the feasibility in DP before the disposition is triggered.
Another disadvantage of this approach is that there might be time
lags and lot size effects due to transports in the supply chain.
• DP-BOMs
Another approach to have the dependent demand available in DP is to calculate
it within DP using DP-BOMs. The DP-BOM is either a PDS or a
PPM – the properties of these master data types are described in chapter
13.4. The PDS for DP is generated from the PDS for SNP or PP/DS
with the transaction /SAPAPO/CURTO_GEN_DP and contains the components
of multiple BOM levels. The PPM for DP is created with the transaction
/SAPAPO/SCC05 for the usage ‘D’ or generated with the transaction
/SAPAPO/MC62. SNP-PPMs (usage type ‘S’) can be used as well, but are
more complicated to create.
To use DP-BOMs the according flag has to be set in the planning object
structure. This causes the selection of the standard characteristics
9APPMNAME and 9ABOMIO for DP-BOMs. In the planning area the key
figures for the independent demand and the dependent demand require
entries in the key figure semantic (401/501, 402/502, …). In the data view
of the planning book at last the option ‘second grid’ has to be selected to
display the dependent demand for a header product.