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Inventory Management Techniques and Ratios

Updated on: Jul 6th, 2021


8 min read

In this article, we will discuss about inventory management in detail.

What is Inventory Management

Inventory management is a compilation of techniques, strategies and tools for storing, delivering, ordering and tracking inventory or stock. For that reason, it’s extremely important for an organization to control the inward and outward inventory in order to reduce losses and maximize profits – which is where the techniques of inventory management come into play.


Inventory Management Technique

There are different types of inventory management techniques which can result in effective inventory management. They are as follows:

ABC Analysis

ABC analysis is a technique of sorting of inventories into 3 categories. The categorization of the inventory under the ABC analysis is done according to how well the inventory can sell and how much it will cost to hold. Always Better Control technique (ABC) analysis classifies inventory into three categories namely: A, B, and C.

This inventory management technique helps an organization to keep working capital costs low because it identifies the line items that need frequent reorder and need not be stocked often. Resulting in reduced obsolete inventory and optimizing the inventory turnover ratio.

Just-in-time (JIT) Method

Just-in-time is a Japanese technique of inventory management, in this technique the company maintains only such quantity of inventory as it requires during the manufacturing/production process. It implies no excess inventory in hand and saves the cost of warehousing, shipping, insurance and another allied cost. Further inventory is ordered when the old stock is close enough to be replenished.

However, this is a slightly risky inventory management technique because a little delay may result in loss of potential sales that can’t be filled. Thus this technique requires proper planning, efficient supplier and timely arrival of inventory so that new orders can be timely placed.

Safety Stock Inventory

This technique emphasis on maintaining a small stock of inventory in hand to protect against any unexpected market demands and the timing difference between the initiation and completion of a production process (lead time). This inventory management technique plays an important part in the smooth operations of the supply chain in various ways. Such as:

  • Guard against unanticipated market demand
  • Prevention of stock outs
  • Provide compensation in case of inaccurate market forecasts
  • And a buffer for longer-than-expected lead times

Without safety stock inventory an organization could experience:

  • Lost customers
  • Loss of revenue
  • Loss of market share

Material Requirement Planning (MRP) Technique

Material Requirements Planning (MRP) is an inventory management technique. Under this technique, the manufacturers/producers order the inventory after taking into account the sales forecast. Material Requirements Planning (MRP)  system incorporates data from different areas of the business where inventory is utilized. After considering the data and the market demand, order for new inventory is placed.


Process of Drop Shipping

Dropshipping is a business model, it allows to sell and ship commodities without owning and stocking them. This technique of inventory management eliminates the cost of inventory holding all together. The Dropshipping process is very simple.

Following are  the benefit of dropshipping:
a. Low startup costs
b. Low inventory cost
c. Low cost of fulfillment of orders
d. Sell and test more products with less risk

Economic Order Quantity (EOQ) Model

In this inventory management technique, a company focuses on the decision regarding how much quantity of inventory should be ordered and when the order should be placed. In this technique, the stock of inventory is re-ordered when it reaches the minimum ordering level. This inventory management technique saves the carrying and ordering cost incurred while placing the order.


Asset management ratio also called for efficiency or activity ratio indicates the return generated from a particular type of asset using the sales, cost and asset data. This ratio helps the business to identify effective utilization of the assets and thereby facilitates efficient management. Inventory turnover ratio is one of the most important asset management ratios for an entity selling physical goods. Ratios related to inventory are given below:

Inventory turnover ratio


Inventory turnover ratio is used to ascertain the rate at which the company’s inventory is converted to cash. A company with higher inventory ratio is considered to have the effective sales strategy. It is generally measured using inventory period which is the average inventory divided by average cost of goods is sold *Average Inventory is the opening balance of the inventory plus the closing balance divided by 2. A high inventory turnover ratio indicates efficient management of inventory and goods are fast moving.

Inventory Outstanding Days

Inventory Outstanding days represent the average number of days it takes for an entity to sell the inventory. It is the number of days the inventory stored in the warehouse before it is sold to the customer.


Operating Cycle


Operating cycle is the number of days it takes for an entity to sell the inventory and collect cash from the customers. This is termed as operating cycle because it is the process of purchasing inventories, selling them, recovering cash from customers, using that cash to purchase inventories and so on is repeated as a cycle

*It is the average days taken to sell the inventory i.e (365/ Inventory Turnover ratio) + This is the number of days for realizing the receivables i.e. (365/ account receivable turnover ratio) A short operating cycle is good as it ensures the entity’s cash is held up for a shorter period.  


Cost of goods sold is Rs. 300,000 opening inventory is Rs 40,000 and closing inventory is Rs. 80,000, we shall calculate the inventory ratio as follows:


So the entity’ inventory management is 5 times efficient and fast moving.


The entity’s inventory outstanding days is 73 meaning, on an average, the inventory is stored in the warehouse for 73 days in a year.

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Quick Summary

Inventory management involves techniques like ABC analysis, JIT, safety stock inventory, MRP, dropshipping, EOQ model, and asset management ratios like inventory turnover and inventory outstanding days.

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