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Cross-Period Lot Size Planning (new)

Use

As of SAP APO 3.1, you can run cross-period lot size planning within Supply Network Planning (SNP) as part of the campaign planning business process and as a preliminary stage of the actual campaign creation that takes place within Production Planning and Detailed Scheduling (PP/DS).

In some industry sectors (such as the process industry) setup activities have a great influence on lot size planning. If the setup costs are relatively high in comparison to the storage costs, orders are grouped into large lots to save on set up costs. However, before now, the SNP optimizer was only able to plan lot sizes limited to one bucket. Here, the optimizer would schedule one setup activity in each period and calculate the specified setup consumption and setup costs in the appropriate production process model (PPM).

As of SAP APO 3.1, the SNP optimizer is also able to plan lot sizes across periods. Here, the optimizer takes into account the setup statuses from the previous period if the same production process model (PPM) is being used to produce a product in that period. This means that the optimizer only schedules one setup operation per lot size. The system then calculates the setup costs and setup consumptions (fixed resource consumption and material consumption) that were defined in the PPM for the resource for which the Cross-Period Lot Size indicator has been set. The optimizer is also able to take into account setup statuses that result from already planned PP/DS orders.

Campaign Planning - The Process

In campaign planning within Supply Network Planning, you are also able to execute rough-cut planning. For example, you could define a business process for the process industry in such a way that the SNP optimizer only performs a cross-network planning run once the forecast data has been transferred from Demand Planning to SNP. For long setup times, it is a good idea to have a rolling monthly planning. The SNP planned orders created by the SNP optimizer correspond to a campaign that is created at a later point in Production Planning and Detailed Scheduling. The SNP planned orders are then converted into (multiple) PP/DS orders. In PP/DS, you then create the actual campaigns (detailed scheduling) for the individual production levels. Here, in order to produce a consistent plan, it is possible to re-run the SNP optimizer on a production level after each campaign is created.

See also release note: Planning of Production Campaigns in PP/DS.

Automatic Generation of SNP PPMs from PP/DS PPMs

As of SAP APO 3.1, it is also possible for you to have the system generate SNP PPMs for lot size margins because cross-period lot size planning requirements in SNP are supported.

See also release note: SNP PPM Generation with Lot Size Margin.

Effects on Existing Data

Effects on Data Transfer

Effects on System Administration

Effects on Customizing

In Customizing for Supply Network Planning, follow this menu path: SAP Advanced Planning and Optimization (SAP APO) -> Supply Chain Planning -> Supply Network Planning (SNP)-> Profiles -> Define SNP Optimizer Profiles. In addition to the SNP optimization run settings, you also have to maintain the Cross-Period Lot Size Planning field and, if required, also activate the Cross-Period Lot Size Planningindicator. You also have to choose the discrete optimization method. For more information, see the documentation for IMG activity Define SNP Optimizer Profiles and the corresponding F1 field-level help.

Further Information

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