The complete product offering of the retailer is termed as merchandise mix. It comprises of the entire range of products stocked by a store offered for sale.

In merchandise management one has to buy the right products in the right quantity at the right price and should make it available to the customers at the right time. This integrated process of buying and managing the stock is an arduous task. Thus various imperative details need to be considered in this inventory management.

It is very important for any organization dealing in inventories to keep a track of the inward and outward inventories.

To manage the stock the lowest level of detail to identify the products is known as the stock keeping unit. Stock keeping unit is ordinarily known as SKU or SKEW in retail language.

An SKU is the identification code which is framed by the retailer itself to identify the product amongst the stock of products it stores. A peculiar shirt of one particular brand, colour, size and style is one SKU. Generally a series of number, alphabets or a combination of both forms the SKU code. When a store has products which have very minute difference, SKUs make it easier to differentiate and mark the product with its code.

Stock keeping units, or SKUs they as they are commonly referred to, are the individual products that the store carries, defined by brand, size, colour, price, style and pattern.

An SKU is not only assigned to physical products or merchandise but can also be used for services and to identify the same. Also other services like extended warranties, delivery fees, installation fees and licenses.

Assigning an SKU to every item in the storehouse or distribution could be an endless task for the manufacturer or retailer. This essential task has been made easier to perform by various computer software which assigns these codes smoothly, eliminating the chances of human error.

In todays retail formats of departmental stores and hypermarkets which are huge and carry a vast variety of goods SKUs become an essential part of the inventory management. Different stores have different SKUs and can vary to a large extent. A supermarkets may carry around 10,000 -15000 SKUs, a Hypermarket may range up to 80,000-1,00,000 SKUs. A single category retail store can have around 10,000 SKUs.

To understand SKUs with an example, assume a store with 4 brands for womens trousers. And these 4 brands are stocked in different sizes colours styles and price points. The SKUs will be as follows:

*4 brands- 4 SKUs

*5 sizes- 20 SKUs

*4colours-80 SKUS

*3 price points-240 SKUs

*2styles-480 SKUs