Good inventory management helps a business know what it owns, where stock is stored, how quickly products sell and when to reorder.
Without a reliable system, businesses can lose money through missing goods, expired products, inaccurate records and unnecessary purchases.
You do not need expensive software to start managing inventory properly. A small shop, online store, restaurant or distribution business can begin with a clear stock list, regular counts and consistent record keeping.
The important part is to update the records whenever stock enters, leaves or changes condition.
What is inventory management?
Inventory management is the process of tracking products, materials and supplies throughout a business. It covers purchasing, receiving, storage, sales, stock movement and replenishment.
For example, a Lagos fashion retailer may need to track different clothing styles, colours and sizes. If the business records only the total number of items, it may not know which sizes are available.
A restaurant faces a different challenge. It must monitor ingredients such as rice, meat, tomatoes, cooking oil and spices, some of which may spoil quickly.
Therefore, an effective system should reflect the type of inventory the business handles.
1. Create a complete stock list
Begin by listing every product or material you want to monitor. Give each item a clear name and, where necessary, a unique stock-keeping unit (SKU).
An SKU is a code that helps identify a particular product or variation. For example, a clothing business may use different codes for a black medium shirt and a white large shirt.
Your inventory list should include:
- Product name and SKU.
- Product category.
- Quantity currently available.
- Purchase cost.
- Selling price, where relevant.
- Supplier details.
- Storage location.
- Reorder level.
- Expiry date or batch number, where applicable.
Use consistent names and codes. If one employee records an item as “red polo” and another calls it “red shirt”, the records may become confusing.
2. Record every stock movement
Inventory records become unreliable when staff update them only occasionally. Record stock as soon as it enters or leaves the business.
When new goods arrive, check the quantity against the purchase order or supplier invoice. Record damaged or missing items before accepting the delivery.
When a sale occurs, reduce the available quantity. Also record goods used for production, internal consumption, transfers, returns and damaged stock.
A simple stock movement record may look like this:
| Date | Item | Stock received | Stock issued | Balance |
|---|---|---|---|---|
| 1 November | Rice, 50kg bags | 10 | 0 | 10 |
| 3 November | Rice, 50kg bags | 0 | 2 | 8 |
| 5 November | Rice, 50kg bags | 5 | 0 | 13 |
| 6 November | Rice, 50kg bags | 0 | 3 | 10 |
This basic record shows how the available quantity changes over time.
3. Choose a stock management method
A spreadsheet can work well for a small business with a manageable number of products. It allows you to record quantities, calculate balances and sort items by category.
As the business grows, inventory software may offer additional features such as barcode scanning, multiple storage locations, user permissions and sales integration.
Choose a system that matches your actual needs. A complicated platform that staff cannot use consistently may create more problems than it solves.
Whatever method you choose, restrict editing access and back up important records.
4. Set reorder levels
A reorder level tells you when to purchase more stock. Without one, businesses may discover that an item has run out only after customers request it.
A simple approach is to set a minimum quantity for each product. When stock reaches that level, the person responsible for purchasing receives an alert or adds the item to the next order.
You can also estimate reorder levels using average daily sales and supplier lead time.
For example, if a shop sells five units daily and its supplier usually takes four days to deliver, the business needs to consider the stock required to cover those four days, plus a suitable safety buffer.
The exact buffer depends on how predictable sales and supplier deliveries are.
5. Organise your storage space
A well-organised store makes stock easier to locate and count. Arrange products by category, size, type or demand.
Label shelves and storage areas clearly. Keep frequently requested items accessible, while fragile or valuable products may need more controlled storage.
For food businesses, pay attention to temperature, ventilation, hygiene and expiry dates. Keep chemicals away from food, and separate products that could contaminate one another.
A clean storage area also makes it easier to notice damaged packaging, pests or leaks.
6. Use FIFO and FEFO where appropriate
Two stock rotation methods can help businesses reduce waste.
FIFO means First In, First Out. The oldest stock is used or sold before newer stock. This works well for many products that do not have strict expiry dates.
FEFO means First Expired, First Out. Products with the earliest expiry dates are used or sold first, regardless of when they arrived.
Food retailers, pharmacies and businesses handling dated goods should pay particular attention to expiry dates and applicable product-handling requirements.
7. Conduct regular stock counts
Your inventory records may not always match the physical goods in storage. Products can be damaged, misplaced, stolen, incorrectly recorded or used without documentation.
Physical stock counts help identify these differences.
Small businesses may count high-value or fast-moving items weekly and conduct a fuller stocktake monthly. Larger operations may use cycle counting, where different product groups are counted on a rotating schedule.
When a difference appears, investigate it rather than simply changing the spreadsheet. Check sales records, purchase documents, returns and stock transfers.
8. Monitor fast-moving and slow-moving products
Not every item sells at the same speed. Fast-moving products may need frequent replenishment, while slow-moving stock can tie up money and storage space.
Review sales data regularly to identify which items deserve more attention.
For instance, a grocery shop may sell rice and cooking oil consistently but struggle to move a particular imported snack. The owner can adjust purchasing quantities instead of repeatedly ordering the slow-moving product.
You should also monitor products that are seasonal or affected by changing customer demand.
9. Assign responsibility for inventory
Inventory management becomes difficult when nobody is accountable for updating records or approving stock movement.
Assign clear responsibilities for receiving goods, recording sales, approving adjustments and conducting counts.
For businesses with several staff members, introduce a simple approval process for stock write-offs and transfers. Keep records of who made changes and why.
This does not mean you should distrust employees. Rather, clear procedures protect both the business and its staff by reducing confusion.
10. Review inventory performance
Stock records become more valuable when you use them to make decisions.
Review how quickly products sell, how often items run out and how much money remains tied up in unsold stock.
You can also monitor inventory turnover, which compares the cost of goods sold with average inventory over a period. A very low turnover rate may indicate excess stock, although the right level depends on the type of business.
Use these insights to improve purchasing decisions and supplier planning.
Build an inventory system you can maintain
The best inventory system is one your team can update accurately and consistently. Start with a stock list, record every movement, set reorder levels and conduct regular physical counts.
As your business grows, consider introducing software that connects inventory with sales and purchasing records.
Most importantly, do not wait until stock goes missing before improving your process. A simple, disciplined system can help you protect business money, serve customers more reliably and make better purchasing decisions.
For businesses that need support with logistics and product movement, explore Easer Lifestyle’s 3PL/4PL Logistics service.
Frequently Asked Questions
1. What is the easiest way to manage inventory for a small business?
Start with a spreadsheet that records product names, quantities, purchases, sales, balances and reorder levels. Update it whenever stock moves.
2. How often should a business count inventory?
The frequency depends on the size and nature of the business. Fast-moving or high-value products may need weekly checks, while a full stocktake can take place monthly or at another regular interval.
3. What is the difference between FIFO and FEFO?
FIFO means First In, First Out: older stock moves first. FEFO means First Expired, First Out: products with the earliest expiry dates move first.
4. What causes inventory discrepancies?
Common causes include recording mistakes, unlogged sales, damaged goods, theft, misplaced products, incorrect deliveries and unrecorded stock transfers.
5. When should a business use inventory management software?
A business should consider software when spreadsheets become difficult to maintain, product variations increase, several staff members handle stock or multiple locations need to share inventory records.
