ABC Analysis is an inventory management technique used to classify materials based on their importance and cost value. Businesses commonly apply this method to manage raw materials, finished goods, store items, and spare parts more efficiently.
Maintaining inventory is one of the most challenging tasks for any organization, especially for manufacturing companies. When factories produce large quantities of finished goods, they often face the problem of dead inventory. Dead inventory refers to stock that remains unused for a long time and locks a significant portion of company capital.
Therefore, companies must manage inventory carefully to avoid unnecessary financial loss.
Today, many organizations use ERP systems and inventory management software to control stock levels. These solutions help businesses monitor inventory and reduce wastage. However, not every company uses these systems effectively.
In many cases, the real problem is not the software itself. Instead, the issue arises because organizations do not plan properly before implementing inventory systems.
What is the 80:20 Principle in ABC Analysis?
ABC Analysis is based on the Pareto Principle, also known as the 80:20 rule. This concept was introduced in the 19th century by the Italian economist Vilfredo Pareto.
According to this principle:
- 20% of inventory items account for nearly 80% of the total inventory cost.
- 30% of inventory items account for about 15% of the total inventory cost.
- 50% of inventory items account for only 5% of the total inventory cost.
In other words, a small number of items consume most of the company’s inventory investment.
Therefore, if organizations focus on controlling these high-value items, they can reduce manufacturing costs and improve inventory efficiency.are only 20% items in stock that costs as much as 80% of the total Inventory cost. Hence if Organizations are able to control with check points to these 20% items will be able to effectively saving huge manufacturing cost.
Item Classification in ABC Analysis
To simplify inventory management, items are divided into three categories:
Category A — High-Value Items (20%)
These items represent a small portion of inventory but contribute to the largest share of cost.
Category B — Medium-Value Items (30%)
These items have moderate value and require balanced monitoring.
Category C — Low-Value Items (50%)
These items are low-cost but exist in large quantities.
However, many industries make a common mistake. Instead of focusing on high-value items, they spend too much time managing low-value inventory.
Class A Items
Class A items include expensive and critical materials such as:
- Raw materials
- Capital equipment
- Costly spare parts
- Electrical panels
Because these items represent a large portion of the total inventory cost, organizations must monitor them carefully.
If companies manage these materials with proper analysis and planning, they can save a significant amount of money in manufacturing operations.
Class B Items
Class B items usually include medium-cost materials such as:
- Machine spare parts
- Industrial bearings
- Belts
- Fuel
- Lubricants
These materials often create hidden inventory losses. Several operational issues cause this problem.
For example:
- Workers replace parts that still work properly.
- Teams do not follow proper procedures when rejecting materials.
- Maintenance teams sometimes keep extra spare parts as backup inventory.
- Preventive maintenance practices are missing.
- Departments raise urgent purchase requests without proper planning.
As a result, Class B items often become the most sensitive category in terms of cost leakage.
Class C Items
Class C items include low-cost materials such as:
- Washers
- Nuts and bolts
- Stationery
- Small consumables
Although these items represent nearly 50% of total inventory quantity, they account for only a small portion of the total cost.
However, many store managers spend excessive time controlling these items because of their large numbers. Frequent physical verification of such low-value materials often leads to unnecessary effort and wasted resources.
Instead, organizations should focus more attention on high-value inventory items.