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  2. Economic lot scheduling problem - Wikipedia

    en.wikipedia.org/wiki/Economic_lot_scheduling...

    The economic lot scheduling problem (ELSP) is a problem in operations management and inventory theory that has been studied by many researchers for more than 50 years. The term was first used in 1958 by professor Jack D. Rogers of Berkeley, [1] who extended the economic order quantity model to the case where there are several products to be produced on the same machine, so that one must decide ...

  3. Economic order quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_order_quantity

    Ordering cost: This is the cost of placing orders: each order has a fixed cost , and we need to order / times per year. This is K D / Q {\displaystyle KD/Q} Holding cost: the average quantity in stock (between fully replenished and empty) is Q / 2 {\displaystyle Q/2} , so this cost is h Q / 2 {\displaystyle hQ/2}

  4. Vendor-managed inventory - Wikipedia

    en.wikipedia.org/wiki/Vendor-managed_inventory

    2. Inventory Ownership. Inventory ownership refers to the ownership of the inventory and when the invoice is being issued to the retailer. In vendor managed inventory, there is a number of solutions in terms of payment and transfer of ownership. [11] In the first alternative, the vendor is the owner of inventory at the premises of the customer.

  5. Material requirements planning - Wikipedia

    en.wikipedia.org/wiki/Material_requirements_planning

    Material requirements planning (MRP) is a production planning, scheduling, and inventory control system used to manage manufacturing processes. Most MRP systems are software-based, but it is possible to conduct MRP by hand as well. An MRP system is intended to simultaneously meet three objectives:

  6. Dynamic lot-size model - Wikipedia

    en.wikipedia.org/wiki/Dynamic_lot-size_model

    The dynamic lot-size model in inventory theory, is a generalization of the economic order quantity model that takes into account that demand for the product varies over time. The model was introduced by Harvey M. Wagner and Thomson M. Whitin in 1958. [1] [2]

  7. Economic batch quantity - Wikipedia

    en.wikipedia.org/wiki/Economic_batch_quantity

    The disadvantages of planning a small batch are that there will be costs of frequent ordering, and a high risk of interruption of production because of a small product inventory. [12] Somewhere between the large and small batch quantity is the optimal batch quantity, i.e. the quantity in which the cost per product unit is the lowest. [12]

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  9. (Q,r) model - Wikipedia

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

    The total cost is given by the sum of setup costs, purchase order cost, stockout cost and inventory carrying cost: (,) = + [(,)] + (,) What changes with this approach is the computation of the optimal reorder point: