MSG Team's other articles

9007 Does India Inc. Have a Diversity Problem? Should Indian Firms Do More for Inclusivity?

What Do Recent Events Indicate About How India Inc. Has a Diversity Problem? It is a well known fact that Indian Corporates often pay lip service to Diversity and Inclusivity and most D&I initiatives often exist on paper with little to show in terms of actual achievements. Apart from culturally shaped attitudes towards women and […]

10790 How to Prepare the Project Risk Assessment Matrix?

The Project Risk Assessment Matrix is one of the required documents to complete the Define phase of the DMAIC methodology. The procedure has been designed in such a way to ensure that people implementing the project have given a thought to what can possibly go wrong and begin thinking of mitigation plans. Here is a […]

11898 What is Stratification ?

Stratification is used mostly in the define stage of a six sigma project. When to use the stratification technique is still on the decision of the people involved in the project. However fairly good cues are given by the fact that the spread of the data is too large. If the points are scattered all […]

11537 The Gender Pay Gap Debate

April 10th is considered to be “Equal Pay” day all over the world. This day has been commemorated since the year 1996 to remind the world that women are allegedly being paid less than men to do the same amount of work. As per the data from Facebook COO’s non-profit organization, women only receive 80% […]

11297 Role of Project Champion in Six Sigma Project

The Project Champion is the person responsible for identifying the Six Sigma Project and making it an organization reality. The role of this kingpin in the conception and execution of the Six Sigma project has been detailed in this article. Stage at Which Required The Project Champion is required at very early stages of the […]

Search with tags

  • No tags available.

Every organization that is engaged in production, sale or trading of Products holds inventory in one or the other form. While production and manufacturing organizations hold raw material inventories, finished goods and spare parts inventories, trading companies might hold only finished goods inventories depending upon the business model.

When in case of raw material inventory management function is essentially dealing with two major functions. First function deals with inventory planning and the second being inventory tracking. As inventory planners, their main job consists in analyzing demand and deciding when to order and how much to order new inventories. Traditional inventory management approach consists of two models namely:

  • EOQ - Economic Order Quantity
  • Continuous Ordering
  • Periodic Ordering

  1. EOQ: Economic Order Quantity method determines the optimal order quantity that will minimize the total inventory cost. EOQ is a basic model and further models developed based on this model include production Quantity Model and Quantity Discount Model.

  2. Continuous Order Model: works on fixed order quantity basis where a trigger for fixed quantity replenishment is released whenever the inventory level reaches predetermined safety level and triggers re ordering.

  3. Periodic System Model: This model works on the basis of placing order after a fixed period of time.

EOQ Model

Example: Biotech.Co produces chemicals to sell to wholesalers. One of the raw material it buys is sodium nitrate which is purchased at the rate of $22.50 per ton. Biotech’s forecasts show a estimated requirement of 5,75,000 tons of sodium nitrate for the coming year. The annual total carrying cost for this material is 40% of acquisition cost and the ordering cost is $595. What is the Most Economical Order Quantity ?

D = Annual Demand
C = Carrying Cost
S = Ordering Cost

D = 5,75,000 tons
C =0.40(22.50) = $9.00/Ton/Year
S = $595/Order

= 27,573.135 tons per Order.

This model pre supposes certain assumptions as under:

  • No safety Stocks available in inventory.
  • No Shortages allowed in order delivery.
  • Demand is at uniform rate and does not fluctuate
  • Lead Time for order delivery is constant
  • One order = One delivery no shortages allowed.
  • This model does not take into account other costs of inventory such as stock out cost, acquisition cost etc to calculate EOQ.

In this model, the demand increases for production the inventory gets depleted. When the inventory drops to a critical point the re order process gets triggered. New order is always place for fixed quantities. On receipt of the delivery against the order the inventory level goes up.

Using this model, further data extrapolation is possible to determine other factors like how many orders are to be placed in a year and what is the time lapse between orders etc.

EOQ For Production Lot:

This model is also used to determine the order size and the production lot for an item to be produced at one stage of production and stored as work in progress inventory to be supplied to the next state of production or to the customer.

Article Written by

MSG Team

An insightful writer passionate about sharing expertise, trends, and tips, dedicated to inspiring and informing readers through engaging and thoughtful content.

Leave a reply

Your email address will not be published. Required fields are marked *

Related Articles

Companys approach to Inventory Health

MSG Team

Inventory Management Systems

MSG Team

Why and When to avoid Holding Inventories

MSG Team