Most shops do not lose money on a single big mistake. They lose it slowly: an item sold below cost, a batch that expired on the shelf, a popular line that was out of stock for a week. Good inventory management is mostly a handful of habits. Here are ten that work for Sri Lankan shops, whether you run a grocery, pharmacy, supermarket or hardware store.
1. Record every stock-in with a goods received note
Stock should enter your system the same way every time: against a purchase order, with a goods received note (GRN) that shows what actually arrived. If deliveries are only “remembered”, your stock figures drift from reality within weeks. A GRN also lets you check the supplier’s invoice against what you really received.
2. Set a reorder level for every product
A reorder level is the quantity at which you should buy more. Set it for each product based on how fast it sells and how long the supplier takes to deliver. Then let the system alert you when stock falls to that level. This single habit prevents most “out of stock” lost sales.
3. Organise products with categories and units
Group products by category and department, and give each a clear unit (pieces, kg, litres, packs). When your catalogue is tidy, you can find items by barcode or name in seconds and your reports mean something. A messy catalogue produces messy numbers.
4. Track expiry dates, and sell oldest first
For food, medicines and agricultural inputs, expiry is a direct money loss. Record expiry dates on stock entries, and get alerts before items expire. Sell the earliest-expiring batch first (first-expiry, first-out) so nothing sits at the back of a shelf. Pharmacies, groceries and agri shops benefit most; see our guide for pharmacies and supermarkets.
5. Use batch numbers where traceability matters
For medicines and chemicals, record the batch or lot number as well as the expiry date. If a supplier recalls a batch, you can tell which customers and which shelves are affected.
6. Count stock regularly, not once a year
Do small, frequent counts. Count one category per week, compare to the system, and investigate differences. Frequent counts find problems (miscounted deliveries, breakage, theft, wrong items rung up) while you can still trace them.
7. Know your fast movers and your dead stock
Use stock movement and sales reports to see which items sell quickly and which have not moved in months. Reorder fast movers with confidence; discount, bundle or stop buying the slow ones. Cash tied up in dead stock cannot pay suppliers.
8. Compare supplier prices and keep supplier accounts clean
Record what you buy from each supplier and what you owe them. When you can compare prices for the same item across suppliers, negotiation gets easier. Paying suppliers on time, with records to back it up, also protects your credit terms.
9. Control who can change stock and discounts
Not everyone needs the power to edit stock quantities or give large discounts. Give cashiers what they need for billing, and keep stock adjustments with the owner or a manager. Limits on cashier discounts and role-based access reduce both mistakes and temptation.
10. Review reports weekly and export them for your accountant
A weekly 15-minute review of stock movement, profit and low-stock items beats a frantic month-end. Export reports to PDF or Excel so your accountant gets clean data instead of photocopied notebooks.
Putting It Into Practice
You do not need to adopt all ten at once. Start with three: GRNs for every delivery, reorder levels on your top 50 products, and weekly counts of one category. Add expiry tracking if you sell perishables.
Invenova brings these together in one place: real-time stock updated on every sale and GRN, expiry and batch tracking, purchase orders and supplier accounts, warehouses and branches, and exportable reports. See Inventory Management Software for Sri Lanka, or book a free demo and we will load a sample of your own products.
Guides by Industry
Stock control looks different in every trade. See the guides for pharmacies, supermarkets, bookshops, agri shops, paint shops, electronics and computer shops and FMCG distributors.