重订货点法(Reorder Point)是物料需求计算的一种重要方式，与通常意义上的方 式不同，重订货点法属于基于消耗计算物料供给的方法。其基本的指导思想是，补货元素的生成与物料需求不直接相关，而是以当前库存作为最重要的参照指标。通 过周期性的库存检查，每当库存水平低于预设的采购触发线（即重订货点）之后，系统就会自动生成对应的补货元素，将库存水平补充到重订货点水平之上。而在这 次补货完成之前，企业仍然可以使用当前剩余库存来满足日常需求。 基于重订货点法产生的补货，无法做到精确对应于需求元素，更无法适应精益生产理论，将库存水平降到最低。但由于这种方法易于实现、易于理解、简单可靠，尤其适用于单位价值较低，且日常消耗频繁而稳定的物料。
Reorder Point Planning
Use
In reorder point planning, procurement is triggered when the sum of plant stock and firmed receipts falls below the reorder point .
Features
The reorder point should cover the average material requirements expected during the replenishment lead time.
The safety stock exists to cover both excess material consumption within the replenishment lead time and any additional requirements that may occur due to delivery delays. Therefore, the safety stock is included in the reorder level.
The following values are important for defining the reorder point:
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Safety stock
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Average consumption
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Replenishment lead time
The following values are important for defining the safety stock:
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Past consumption values (historical data) or future requirements
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Vendor/production delivery timelines
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Service level to be achieved
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Forecast error, that is, the deviation from the expected requirements
Manual Reorder Point Planning
In manual reorder point planning, you define both the reorder level and the safety stock level manually in the appropriate material master.
Automatic Reorder Point Planning
In automatic reorder point planning, both the reorder level and the safety stock level are determined by the integrated forecasting program.
The system uses past consumption data (historical data) to forecast future requirements. The system then uses these forecast values to calculate the reorder level and the safety stock level, taking the service level, which is specified by the MRP controller, and the material's replenishment lead time into account, and transfers them to the material master.
Since the forecast is carried out at regular intervals, the reorder level and the safety stock level are continually adapted to the current consumption and delivery situation. This means that a contribution is made towards keeping stock levels low.
For reorder point planning, the system supports the Fixed lot size and Replenish up to maximum stock level lot-sizing procedures.
Reorder level lower than safety stock
Message no. M3286
Diagnosis
You have specified a reorder point that is lower than the safety stock. Since the reorder point includes the safety stock, it must exceed the safety stock.
Procedure
Change the reorder point.