The Economic Order-Quantity (EOQ) Model

Describe the Economic Order Quantity (EOQ) from very first principles.

EOQ, or Economic Order Quantity, was developed by F. W. Harris in1913, even if R. H. Wilson is recognized for his early deeply analysis of the design. Harris's initial pape was disseminated; it really was neglected for several years before its rediscovery in 1988. Throughout this duration, a lot misconception established over the origin of the EOQ design.

The model is specified as the ideal quantity of orders that minimizes total variable costs required to purchase and hold inventory.

The very first part of the essay will discuss the concepts of the EOQ and provides an idea about how it works.

2nd part will sets out its benefits and drawbacks.

EOQ is not a basic option however an instrument, which allow the firm to determine the order size that will reduce the overall inventory expenses, by determining a financial order quantity. It describes the most beneficial order volume that will lead to the most affordable total of order and carrying costs for a short article of stock offered its anticipated use, carrying costs and purchasing cost.

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Thus, by dint of its concepts, the EOQ tool can be utilized to form the amount of inventory that the company should purchase every month.

Indeed, there are two categories of costs that require to be considered: buying expenses and carrying expenses (likewise called holding costs) which need to be defined.

Holding cost, bring cost is the expense associated with having stock on hand. It is made up of the costs related to the stock financial investment and storage cost.

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For making use of the EOQ computation, the cost must change based upon the amount of inventory on hand in order to be included in bring cost. In the EOQ formula, bring cost is represented as the yearly cost per average on hand stock system.

The rate of interest would become part of the bring expense if a loan is needed to spend for your inventory. If there are loans on other capital products, making use of the rates of interest on those loans is possible because a reduction in stock would free up money that might be used to pay these loans. If you are financial obligation totally free you would need to figure out how much you might make if the cash was invested.

Insurance expenses are also a part of carrying cost since they are straight connected to the overall worth of the inventory.

If a payment of any taxes on the value of the inventory is necessary they would also be included.

Mistakes in calculating storage costs are frequent in EOQ implementations. Generally, companies take all costs associated with the warehouse and divide it by the average inventory to determine a storage cost percentage for the EOQ calculation. This tends to include costs that are not directly affected by the inventory levels and does not compensate for storage characteristics. Carrying costs for the purpose of the EOQ calculation should only include costs that are variable based upon inventory levels.

As to the ordering cost, it is associated with processing the order, by receipt and settlement of the suppliers bills. The marginal cost of the additional order can be appraised; its a fixed cost, independent of the size of the order.

When the order quantity (Q) increases, the total ordering costs decrease while the total carrying costs increase. The economic order quantity, denoted by Q, is that value at which the total cost of both ordering and carrying will be minimized.

The total cost curve reaches its minimum at the point of intersection between the ordering costs curve and the carrying costs line. The value of Q corresponding to it will be the economic order quantity Q.

The EOQ formula can be used in order to improve the management of supply, even if there is any information concerning the costs. It can reduce the value of the average inventory for the same order load and decrease the order load for the same average inventory.

The advantage of the EOQ formula is that it provides a baseline for getting the best deal. It helps you purchase what you are going to use and keeps you from over purchasing to get deals from vendors.

The disadvantages are obvious if you have a high periodicity or seasonality to your consumption, or your usage is minimal. EOQ should only be applied to higher volume items that are worth inventorying; for example, using EOQ to order memory chips for a retail computer store can be detrimental since the demand can vary greatly and the risk that they will become obsolete is high.

Knowing and understanding both historical and future demand, and maintaining a sane safety stock are the keys to use EOQ reliably. Furthermore, there should not have seasonality.



Updated: Jul 07, 2022
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The Economic Order-Quantity (EOQ) Model. (2016, Jul 19). Retrieved from

The Economic Order-Quantity (EOQ) Model essay
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