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Monthly Archives: November 2008
Lot-size for continuous production and process industry
A suitable lot-size for continuous production can be hard to come up with. Picture the situation of a mineral oils manufacturer that refines crude oil to 3 co-products. The planner wishes to control the process flow to align the production with demand (i.e. the refinery is not continuously refining at the same speed as it [...]
Consumption-based planning and MRP
MRP and Consumption-based planning are two fundamental SAP planning types that can be used to determine a product’s requirements. To avoid any confusion on the subject: I am not talking about the MRP run that is executed through MD01 and MD02. I’m talking about planning types that are set in the Material Master’s MRP1 tab. [...]
Dead stock report – MC50
The dead stock report often leads to misinterpretations. Hence a little guidance on the dead stock report. The dead stock report analyses what part of stock is never touched in a defined period of time. If you look at the below graph you will see stock level through time. In analyzing stock movement between period [...]
MRP processing keys
NETCH, NETPL and NEUPL are three fundamentally different ways to schedule your MRP run: NETCH – Net Change Planning NETPL – Net Change Planning within Planning Horizon NEUPL – Regenerative Planning I will elaborate on these three options and their workings:
Different planning views
End-users can get confused about the difference between MD04 – Stock/requirement List and MD05 – MRP List. This post will give you the answer on when to use what report and why:
Replenishment to Maximum Stock Level
It is not uncommon that the use of the field Maximum Stock Level in the MRP1 tab in the Material Master leads to misinterpretations. This field can only be properly used together with lot-sizing procedure HB: Replenishment up to maximum stock level. This is commonly used for tanker planning where storage is limited to the [...]
Change log SE16N
In SE16N you can change SAP tables directly. I explained how to in a previous post. I also warned for the risks involved in doing this. Luckily direct changes in SAP tables are also logged, so you can trace back to the culprit who messed things up. You can query the following SAP tables to [...]
Firming types in MRP
In a production environment it may not be preferable that new requirements on the short term can influence production quantities. The length of the term can be determined by the planning time fence. How MRP treats new requirements in this period can be determined using the firming type in customizing for MRP type:
Purchase order pricing date