Determination of the Reuse Mode
Use
To determine the reuse mode that a procurement planning heuristic uses in the planning run, the system evaluates the following reuse modes:
· Reuse mode in the planning file
· Reuse mode in the settings for the procurement planning heuristic
· Reuse mode in the settings for the MRP heuristic
This case is relevant if an MRP heuristic calls the procurement planning heuristic.
The system determines the reuse mode at the start of a planning run using a procurement planning heuristic or an MRP heuristic.
Features
The determination of a reuse mode from two or more reuse modes is based on the following symmetrical matrix. The resulting reuse mode is specified in the matrix for each possible combination of two reuse modes.
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|
- |
1 |
2 |
3 |
4 |
|
- |
- |
1 |
2 |
3 |
4 |
|
1 |
1 |
1 |
2 |
3 |
4 |
|
2 |
2 |
2 |
2 |
4 |
4 |
|
3 |
3 |
3 |
4 |
3 |
4 |
|
4 |
4 |
4 |
4 |
4 |
4 |
In the matrix, the reuse modes are represented by the numbers 1 to 4 as follows:
1 Use suitable receipts
2 Delete unfirmed receipts
3 Re-explode plan
4 Delete unfirmed receipts, re-explode firmed receipts
The minus sign ( – ) means that a reuse mode does not exist. This case is relevant for a product without a planning file entry. No reuse mode is entered here in the planning file.
You call the product heuristic for a product in interactive planning. The reuse mode in the planning file is 2; the reuse mode in the product heuristic settings is 3. The resulting reuse mode in the matrix is 4.
The system also uses the matrix if it has to take account of more than two reuse modes. In this case, the system determines the resulting reuse mode successively, meaning that it uses the matrix to determine a reuse mode from two of the reuse modes. The system then uses the matrix to derive a reuse mode from this reuse mode and the third reuse mode, and so on. The following formula shows how the system calculates the reuse mode (RMode):
RMode = ...[[[RMode 1 o RMode 2] o RMode 3] o RMode 4] o ...
The o sign symbolizes the determination of a reuse mode from two reuse modes using the matrix.
The method is relevant in the following cases, for example:
· Planning several products with a procurement planning heuristic
If you call a procurement planning heuristic for several products, the system first uses the matrix to determine a reuse mode from the various possible reuse modes for the products in the planning file. To plan the products, the system uses the reuse mode it determined from this reuse mode and the reuse mode in the heuristic settings:
RMode =
[RModes from planning file] o RMode in the heuristic settings]
· Planning a product with an MRP heuristic
The system determines the reuse mode here as follows:
RMode =
[RMode of MRP heuristic] o RMode of procurement planning heuristic]
o RMode of planning file
If you plan several products with an MRP heuristic, the system has to take account of packages.
See also
SAP note 557731