Hello Dear,
SNP Plans :
An SNP plan is the basis for planning in-house production in SNP and is stored in APO as SNP PPM or SNP PDS. SNP planning is primarily designed to provide a plan outlining the resource and component requirements in advance, and it does not aim to provide an exact model of all technical options. SNP plans are therefore simpler than PP/DS plans. Mode linkage, cover, minimum and maximum intervals of relationships, and so on are not important in SNP planning and therefore cannot be maintained in the SNP PPM. Alternative modes must be modeled in SNP as alternative PPMs or alternative SNP PDSs. An SNP plan refers to planning in planning periods. The length of an activity cannot be less than a day. SNP permits "day" as the smallest planning period. You can therefore plan accurately to one day at the most. In contrast, PP/DS permits planning to the exact second.
PP/DS Plans
A PP/DS plan provides the basis for planning in-house production in PP/DS. PP/DS plans are stored either as PP/DS PDSs or as PP/DS PPMs. In PP/DS, the production process is described using activities that are linked through relationships. Several logically related activities form an operation. In discrete manufacturing, an operation is generally composed of setup activities and processes. In process industries, on the other hand, operations are often more complex. An operation in the process industry can therefore consist of activities such as mixing, stirring, heating, cooling and cleaning. The activities of one operation must not be interrupted by the activities of another operation. The switch for continuous reservation of the resource is set in the PPM. This feature is called "Cover". In the PDS, the Cover feature for the activities in an operation is always set automatically.
The activities of a PP/DS plan can be carried out on alternative resources. These are defined as a mode in the plan. Each mode can have a different duration. If an activity is carried out on a certain alternative resource, this can mean that subsequent activities must also be carried out on compatible resources. This is known as mode linkage. The simplest case of mode linkage is where setups and processes have to be executed on the same resource.
You require both components and resources to execute an activity. The component consumption of each activity is also defined in the PP/DS plan.
In APO, you can use PP/DS PPMs, iPPE models, or PDSs generated from R/3, as PP/DS plans. The PP/DS PPM or a PDS generated from R/3 is either a combination of an R/3 BOM and an R/3 routing, or a combination of an R/3 BOM and an R/3 recipe.
Regards
Rahul Chitte
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