<Tr> <Td> </Td> <Td> This article needs additional citations for verification . Please help improve this article by adding citations to reliable sources . Unsourced material may be challenged and removed . (December 2007) (Learn how and when to remove this template message) </Td> </Tr> <P> The reorder point (ROP) is the level of inventory which triggers an action to replenish that particular inventory stock . It is a minimum amount of an item which a firm holds in stock, such that, when stock falls to this amount, the item must be reordered . It is normally calculated as the forecast usage during the replenishment lead time plus safety stock . In the EOQ (Economic Order Quantity) model, it was assumed that there is no time lag between ordering and procuring of materials . Therefore the reorder point for replenishing the stocks occurs at that level when the inventory level drops to zero and because instant delivery by suppliers, the stock level bounce back . </P> <Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section does not cite any sources . Please help improve this section by adding citations to reliable sources . Unsourced material may be challenged and removed . (October 2016) (Learn how and when to remove this template message) </Td> </Tr>

What is the formular for re order point