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 Subassembly Planning in the CTP Process

Use

You can use the planning strategy subassembly planning in the CTP process for planning important assemblies. In subassembly planning, you create planned independent requirements important assemblies to execute a planning run for these assemblies before any sales orders are received. Production is then triggered for these planned independent requirements . On receipt of the sales orders for the finished product which require these assemblies, the dependent requirements of the assembly consume the previously created planned independent requirements and use the receipt elements already created for the assembly by the system. If the dependent requirement quantity exceeds the quantity of the planned independent requirements, the system creates a new receipt element for the planning procedure Cover Dependent Requirements Immediately ; or the system schedules the dependent requirement as far in the future as is necessary to find a suitable receipt element for the planning procedure Manual With Check .

Prerequisites

  • Enter the strategy 20 Planning with Final Assembly in the assembly product master in SAP APO, and set the Assembly Planning indicator.

  • Set the consumption mode Backward/Forward Consumption and the consumption period 999 days backwards and 999 days forwards for a component/assembly that is planned with the planning procedure Manual With Check or Cover Dependent Requirements Immediately . This ensures that every dependent requirement can be consumed later.

Features

The system creates the ATP category ID (temporary requirements subassembly planning) for the dependent requirements that are created within a CTP check for the assembly with the strategy Subassembly Planning . This ensures that dependent requirements are not immediately consumed with the planned independent requirements. The system does not consider the planned independent requirements that were not consumed for the net requirements calculation that was executed during the CTP check and is based on the planning procedure Cover Dependent Requirements Immediately or Manual With Check . This ensures correct forward scheduling. This prevents inconsistencies if you terminate the CTP check before saving.

If you save the CTP check, the system converts the temporary ATP category ID to the remaining dependent requirements category AY.The system then triggers the consumption of the dependent requirements with the planned independent requirements. The same occurs for a stock transfer. The "actual" category for the stock transfer requirement is BH. The category ID is also used temporarily for the stock transfer requirement during the CTP check. The system replaces the ATP category with the BH category when saving the sales order.