the Demand planning, Material Requirements Planning (MRP), referred to as Materialbedarfsplanung in SAP Business One, is an automated planning procedure that calculates which items need to be procured or manufactured, when, and in what quantity, based on open orders, forecasts, and current stock levels.
SAP Business One provides the "Planning Wizard" for this purpose. This wizard initiates an MRP (Material Requirements Planning) run, which calculates net requirements from stock, demand sources – including sales orders, production orders, and forecasts – as well as receipts from open purchase orders and production orders. The system considers item-specific parameters: lead times control how far in advance an order needs to be triggered; minimum stock levels define a safety buffer; lot sizing rules and order intervals consolidate demand. The result of an MRP run is planning recommendations, which the planner can convert individually or in bulk into purchase orders, production orders, or stock transfer requests in the confirmation window. Additionally, the system supports sales forecasting: if no firm customer order exists, the MRP run offsets forecast values against actual sales to avoid duplicate planning.
Demarcation
The requirements planning provides suggestions but does not make binding procurement decisions. The conversion of recommendations into firm documents always requires confirmation by the responsible planner.
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