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  2. (Q,r) model - Wikipedia

    en.wikipedia.org/wiki/(Q,r)_model

    Its is a class of inventory control models that generalize and combine elements of both the Economic Order Quantity (EOQ) model and the base stock model. [2] The (Q,r) model addresses the question of when and how much to order, aiming to minimize total inventory costs, which typically include ordering costs, holding costs, and shortage costs.

  3. Economic order quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_order_quantity

    a spreadsheet method, whereby the EOQ for each stock item is calculated and recorded manually; entry of the EOQ formula into a new or existing inventory management system. He suggests that a system-based implementation would be beneficial where the number of stock-keeping units is over around 2000. Annual updating of data and formulae are ...

  4. Economic production quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_production_quantity

    This method is an extension of the economic order quantity model (also known as the EOQ model). The difference between these two methods is that the EPQ model assumes the company will produce its own quantity or the parts are going to be shipped to the company while they are being produced, therefore the orders are available or received in an ...

  5. Base stock model - Wikipedia

    en.wikipedia.org/wiki/Base_Stock_Model

    In a base-stock system inventory position is given by on-hand inventory-backorders+orders and since inventory never goes negative, inventory position=r+1. Once an order is placed the base stock level is r+1 and if X≤r+1 there won't be a backorder. The probability that an order does not result in back-order is therefore:

  6. Economic batch quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_batch_quantity

    Compared to the EOQ equation, there is a factor d/p introduced. This is due to the fact that when we produce a component while it is used in downstream production at the same time, inventory levels will not reach the same peak as when we order the components from a supplier and receive the batch at a single point in time.

  7. Reorder point - Wikipedia

    en.wikipedia.org/wiki/Reorder_point

    Reorder level = Average daily usage rate × Lead time in days = 50 units per day × 7 days = 350 units. When the inventory level reaches 350 units an order should be placed for material. By the time the inventory level reaches zero towards the end of the seventh day from placing the order materials will reach and there is no cause for concern.

  8. Inventory - Wikipedia

    en.wikipedia.org/wiki/Inventory

    Inventory credit refers to the use of stock, or inventory, as collateral to raise finance. Where banks may be reluctant to accept traditional collateral, for example in developing countries where land title may be lacking, inventory credit is a potentially important way of overcoming financing constraints. [ 26 ]

  9. Safety stock - Wikipedia

    en.wikipedia.org/wiki/Safety_stock

    An inventory node is supplied from a "source" which fulfills orders for the considered product after a certain replenishment lead time. In a periodic inventory policy, the inventory level is checked periodically (such as once a month) and an order is placed at that time as to meet the expected demand until the next order.