Inventory is divided into various categories for effective management. Some of the popular Inventory Management Techniques are ABC Analysis which is based on the Annual Rupee Value of the Store Keeping Unit (SKU), the FSO/FSN (Fast Slow, Occasional/Non-Moving) Analysis, is based on the movement of the SKU, the VED (Vital, Essential, Desirable) Analysis is based on the criticality of the item finally in the Kraljic matrix the inventory is classified into four categories based on its importance/profit and risk/complexity. Since ABC Analysis is based on both cost and consumption, hidden within the ABC Analysis is the FSO/FSN analysis.
Inventory Decisions. Based on these categories, Inventory decisions such as Safety Stock Levels, Level of Control, Order size, Reorder point, no of times to order in a year. Average Inventory, Maximum Inventory Level, Minimum Inventory Level, No of Suppliers, etc. are made.
ABC Analysis, sometimes called Always Better Control divides the inventory into Category A – High Annual Rupee value, Category B – Medium Annual Rupee value, and Category C – Low Annual Rupee value. The Annual Rupee value or Annual usage value is calculated by multiplying the Cost of the Item by the Consumption. The Annual Rupee value is then put in descending order and the Pareto Principle is then used to divide the inventory into the three categories A, B, C. Category A is between 10-20% of the inventory, Category B is about 20-30% and Category C is about 50-70%.
Category
Control
Accuracy
Level of Control
Order Size
Average Max/Min Inventory
No of Suppliers
A
Tight
High
Manager
Low
Low
Large
B
Medium
Medium
Asst Mgr.
Medium
Medium
Medium
C
Loose
Low
Supervisor
High
High
Few
Problems with ABC Analysis. ABC analysis only classifies the inventory into categories based on the cost. It does not take into consideration the criticality, risk, profit, strategic importance, or complexity of the item. The Indian Navy overcame this problem by combining it with the VED Analysis.
Inventory Control in the Indian Navy. The Indian Navy combines the ABC and VED Analysis into nine categories which takes into consideration the cost, movement and criticality. The nine categories are Vital - A, Vital - B, Vital - C, Essential - A, Essential - B, Essential - C, Desirable - A, Desirable - B, Desirable – C. The Inventory policies for each of these 9 Categories are very clearly defined with Vital – A SKUs being given the maximum attention and Desirable – C items given minimum attention.