How to Improve Inventory Accuracy: 10 Proven Techniques for Ecommerce

Introduction  

In an ecommerce business, inventory accuracy can impact revenue, customer satisfaction, and costs directly. The website might show product availability, but the warehouse might be out of stock, or vice versa. These issues can result in lost sales through cancelled orders, increased shipping costs, buying stock in error, and unhappy customers.

As sales channels increase through websites, marketplaces, retail stores, and distribution centres, maintaining accurate stock records becomes increasingly difficult. Manual inventory counts and disconnected systems tend to create more opportunities for human error.

Ecommerce brands do not need to overcomplicate their operations to get better inventory accuracy. Combining warehouse basics with smart tools means ecommerce businesses can achieve reliable stock information and informed decisions at every touchpoint.

What Is Inventory Accuracy?  

Inventory accuracy measures the match between the number of units recorded in inventory and the physical stock of inventory items. If the seller's system shows 500 SKUs of an item and matches the physical inventory level, then the inventory records are 100% accurate. Inventory accuracy can be more encompassing than stock count and can include the exact location of each item. The right amount of a product on hand isn’t much good if the seller can’t locate the units efficiently to pick and ship.

For ecommerce fulfillment, accurate records and reliable data form the basis of not just purchasing decisions, but a business's forecasts, fulfillment, and customer service functions. When one data point is inaccurate, so are the decisions merchants make based on it.

How to Calculate Inventory Accuracy?

One of the simplest ways to measure inventory accuracy is to use the following formula: 

Inventory Accuracy = (Accurately Recorded Items ÷ Total Items on Record) × 100

For example, if your audit included 1,000 product records and 950 match physical quantities on hand. This results in: (950 ÷ 1,000) × 100 = 95%

Alternatively, you can measure inventory accuracy using a variance-based calculation. Here, you will compare physical inventory against recorded inventory and look for surpluses or shortages.

Each business is unique, but most aspire to have at least 90% inventory accuracy, with 95% considered exceptional. Inventory accuracy depends on factors such as product types, Order volumes, fulfillment model, and customer expectations.

Why Is Inventory Accuracy Important for Ecommerce Businesses?  

Good stock data informs virtually every part of an online business. Here’s just how:  

• Preventing Overselling: When products are no longer available, Inventory accuracy helps customers by preventing orders and reducing cancellations, refunds, and delayed shipments. 
• Avoiding Stockouts: Your team can reorder products before they’re sold out because they can forecast demand, rather than finding out they sold out after an order has come in.
• Reducing Excess Stock: Reliable inventory data shows which items aren’t selling so you don’t tie up capital in unsold inventory.
• Streamlining Operations: Accurate data informs forecasting, purchasing, fulfillment, and customer service processes because your team can confidently rely on the data they see.

What Causes Inventory Inaccuracy?  

Several common operational issues can cause inaccuracies in inventory recording:

• Manual Data Entry: Manual data entry is one of the most common causes of inventory inaccuracy; entering the wrong amount, SKU, or location results in inaccurate records.
• Ineffective Receiving Process: An ineffective receiving process can also lead to issues; receiving products without updating the system with the correct details causes errors to propagate.
• Mislabeled Products: Mislabeled products can result in inaccurate inventory records.
• Returns Not Checked In: Returns that are not checked in can cause inventory inaccuracy.
• Damaged Stock: Damaged stock can contribute to discrepancies between recorded and available inventory.
• Missed Stock Take Adjustments: Major stock take adjustments being overlooked can leave inventory records inaccurate.
• Inconsistent Warehouse Operations: Warehouse operations that are not consistently followed can contribute to inventory inaccuracies.

Selling across multiple sales channels creates further challenges. When a product sells on one channel, but stock levels are not updated in other channels, it can result in a customer purchasing something that is no longer available. Disconnected systems, delays in updating data, and employees not following correct procedures can only compound these issues.

How to Improve Inventory Accuracy: 10 Techniques  

1. Perform Regular Cycle Counts 

Instead of waiting to perform a stock take every 12 months, conduct smaller stock counts of specific products regularly. This activity, known as cycle counting, helps identify discrepancies while routine operations continue. Focus on the most valuable stock and high-turnover items, as discrepancies in these products have the most significant impact on sales and cash flow. 

The cycle can also be structured for products that are more prone to inventory issues. When a discrepancy occurs, identify the reason and correct the associated process.

2. Use Barcode Scanning

Barcode scanning streamlines processes, such as receiving, picking, packing, and stock counting, while reducing manual data entry. Every time an item is scanned, it is linked to its SKU, helping reduce errors like mistyping details or picking the wrong item. It gives staff an easy way to update system records accurately when products move through the warehouse.

3. Standardize Inventory Processes 

Establish one method for receiving, storing, picking, shipping, managing returns, and adjusting inventory. Staff need to be clear on when stock levels are updated and who is responsible. This standard procedure needs to apply across all warehouses and sales channels where possible. Checklists and written work procedures can support task standardization.

4. Train Employees on Inventory Processes

People are a significant part of the inventory process, so staff need training on all inventory activities, including receiving, scanning products, processing returns, recording damaged items, and processing stock takes. Training should continue with refreshers as products or processes change, not just at initial training. 

5. Optimize Warehouse 

Products are more likely to be found and accounted for when your storage facilities are tidy and organized. Label aisles, shelves, bins and locations clearly. Where possible, group similar products together, especially if SKUs have similar names or packaging. Place high-turnover stock in the easiest locations for picking and processing, and regularly clear out any damaged, obsolete, or misplaced goods from storage areas. 

6. Centralized Multi-Channel Inventory 

If you sell stock across multiple sales channels, such as your website, the Amazon Marketplace, or physical retail stores, your inventory is managed separately, which can cause discrepancies. Multi-channel inventory management merges the stock and order information from each channel. This provides a single view of total stock on hand at any time and will be particularly useful if you sell the same products across multiple marketplaces. 

7. Achieve Real-Time Inventory 

Unless your inventory levels are updated in real-time, there is a risk that customers may order products that are no longer available. Real-time inventory ensures stock levels are updated as orders are placed, items are dispatched, or returns are processed. This is especially useful at times of high sales activity, such as during a seasonal promotion. 

8. Investigate Inventory Discrepancies 

When you identify a stock discrepancy, it is important not only to correct it, but also to understand where it came from. For example, if products frequently turn out to be short after a return is processed, you may need to review the return process. If shortages occur after you receive new stock, this indicates the receiving process needs examination. Analyzing sources of discrepancies will help you to fix the underlying problem and prevent recurrence.

9. Use an Inventory Management System

As business grows and you start to manage hundreds or even thousands of products, spreadsheets can become difficult and time-consuming. An inventory management system provides a single source of truth for your stock information and can automate many inventory processes, such as updating stock levels when orders are placed. When selecting a system, look for features such as barcode support, order management, stock alerts, purchasing tools, and reports. 

10. Track Returns, Damages, and Adjustments 

Inventory doesn’t only decrease when items are sold. Customer returns, damaged items in the warehouse, product replacements, free samples, and lost items can all impact inventory. The returns process should be clearly defined, and returns should be inspected before they are returned to stock.

How to Measure Inventory Accuracy?

Ongoing metrics let you monitor if your efforts are having an impact. Keep a close eye on inventory accuracy as you run your cycle counts, comparing results against previous cycle counts.

You’ll want to track other inventory metrics, too:  

• Stockouts
• Oversells
• Warehouse inventory adjustments
• Order fulfillment accuracy
• Discrepancies identified in counts

Look for trends and patterns for each item by location, sales channel, and warehouse process. If one SKU consistently underperforms your benchmarks, investigate the underlying cause. Your inventory accuracy target should not be impossibly high, but it also needs to promote continued improvement, so keep it challenging. Consistent measurement discipline will transform stock accuracy into an important metric for ongoing inventory performance improvement, rather than just a one-off project.

Final Thoughts  

Boosting inventory accuracy doesn’t have to be overly complicated. The best inventory practices are typically the most fundamental ones: stock counts on a recurring basis, standardizing procedures, and tracking discrepancies, done consistently. For expanding ecommerce business, utilizing technology brings these practices to the next level.

A quality inventory management software connects sales channels, automatically updates the counts, and creates visibility for the operation. Ultimately, all of this serves to ensure that the stock that customers see online matches what sellers have in inventory. A company equipped with accurate information and standard processes will experience fewer errors, no overselling, and few stockouts to maintain a productive workplace and robust brand value.