Picture this: your customer has been looking forward to their order, and what arrives isn’t what they bought. It’s like ordering a gourmet pizza for the office party and getting soggy salad bowls instead. Disappointing, and a complete anticlimax.

Beyond the disappointment, picking errors cost your business. Each mispick can mean a return, a refund, a reshipment, and often a bad review, plus stock counts that no longer match what’s on the shelf. They hurt customer satisfaction, operational efficiency, and your bottom line.

This guide explains what picking errors are, why they happen, and how to prevent them, so you can avoid delays, disappointment, and customer service headaches.

What are picking errors?

Picking errors are inaccuracies in the fulfillment process that leave customers with an incorrect order. These are the main types:

• Standard mispick: The wrong item is selected for an order, so the customer receives an incorrect product.
• Wrong quantity: The wrong number of items is picked, which confuses the customer and can cause overstock or stockouts for you.
• Incorrect item: A similar-looking item, or one with a similar name, is picked, but it’s still not what the customer ordered.
• Location error: The picker takes items from the wrong storage location, which leads to incorrect fulfillment and makes the right stock harder to find later.
• Substitution error: A different item is substituted for the one ordered because of stock unavailability or oversight.

What are the most common causes of warehouse picking errors?

Before looking at prevention, it helps to understand why errors happen. The root cause is typically a mix of inadequate inventory management, tired or under-trained staff, and a poor warehouse layout.

• Poor organization: Without clear labeling and logical storage, finding the right item is like finding a needle in a haystack, and errors are much more likely.
• Lack of training: Without proper training on picking procedures and systems, staff are more prone to mistakes.
• Inefficient processes: Unclear routes, paper lists, or outdated technology create bottlenecks and raise the chance of errors, especially at peak times.
• Human error and fatigue: Everyone makes mistakes, and people make more of them when they’re tired or rushed. Some errors will always happen where people are involved.

You can’t remove human error completely, but with the right processes and technology you can catch most errors before they become bigger problems.

How to prevent picking errors in a warehouse: a step-by-step guide

With the main causes in view, here are the practical steps. Many of these fixes help speed too, so see our companion guide on improving warehouse picking speed and accuracy if throughput matters as much to you as accuracy, and our overview of efficient order picking for picking methods.

Assess your current picking accuracy

You can’t improve what you haven’t measured, so start by establishing a baseline. Look at your past order data, ask for customer feedback, and run spot checks, then track these measures over time:

• Pick accuracy rate: correct picks ÷ total picks × 100
• Mis-picks per 1,000 order lines, which makes it easier to compare over time
• Orders returned or reshipped for the wrong item
• Picks per hour, read alongside accuracy and never on its own

Then look for patterns. Are certain products mis-picked more than others? Do errors peak at certain times of day, or on certain days? If the same product keeps being mis-picked, the problem is probably its label, location, or packaging, not the picker. Inventory management software can track these metrics for you.

Improve your warehouse layout

A well-organized layout doesn’t just raise productivity. It makes it easier for pickers to find and retrieve the right item. To minimize travel time and mistakes, consider:

• Aisle width
• Storage shelving height
• Proximity to packing stations
• Lighting and visibility
• Signage and labeling
• Placement of picking equipment (carts, pallet jacks, forklifts, and so on)

Create an organized system for your inventory

• Inventory placement: Put high-demand items in easy-to-reach locations to reduce the distance pickers travel.
• Inventory zoning: Divide the warehouse into zones and assign pickers to each one, so picking can happen in parallel and travel time drops.
• Traffic flow: Design pathways that avoid congestion and bottlenecks.
• Bin locations: Group similar items together, with specific bin locations, so they’re easier to find. Keep look-alike items apart so they’re not confused.
• Signage and labeling: Use clear signs and descriptive labels with item names, SKUs, and locations.
• Show the item. A product image on the pick screen helps people confirm they have the right item, especially for look-alike products. Keep the screen to what the picker needs: item, quantity, and location.

Use barcode scanning

Barcode scanning is one of the most effective ways to prevent picking errors. It adds a verification step, so the right item has to be confirmed before a pick counts, and it cuts the data entry mistakes that come with typing and paper lists.

• Mobile devices let you scan, track, and update stock in a fraction of the time manual entry takes.
• Scanning catches many errors caused by human error, so accuracy improves across the board.
• Picking and packing get faster, because the system confirms each item as it’s handled.

Linnworks warehouse management enforces scanning at pick and pack. It can check the item, the bin location, and the packing station, and each check is configurable per workflow. The system won’t register a pick or progress a pack until the right scan is made. If a barcode is damaged or missing, staff can override it with a system note, which keeps a full audit trail without stopping the line.

See our guides to barcode inventory management and warehouse scanning equipment. Not sure how to get barcodes for your products? See this guide.

Design mistakes out of the workflow

Poka-yoke is a Japanese term for mistake-proofing. The idea is to design the process so the error can’t happen, or gets caught immediately, instead of relying on people to be perfect. In a warehouse, that means building checks into the workflow, such as scan-to-confirm at the shelf and again at the pack station, sensible default quantities, and consistent labels and locations. The right way should be the easy way.

Set up a warehouse management system (WMS)

A warehouse management system coordinates the whole warehouse, from receiving and storing stock to picking, packing, and shipping. It supports accuracy in several ways:

• Guided workflows. Digital picklists and task allocation replace paper, so pickers aren’t matching items by eye.
• Visibility. You can see stock levels and order statuses, so you spot bottlenecks and problems earlier.
• Fewer manual steps. When stock movements are captured automatically, there are fewer places for discrepancies to creep in.

If you’re evaluating options, see our guide to warehouse picking software for what to look for.

Organize, train, and recognize your team

Your team’s skills and motivation are central to accuracy.

• Organize by role. Instead of one person pulling the packing slip, picking, and packing, split the work into stages. Have pickers work particular zones, and set up a separate packing area that checks each order after it’s picked. Specialists get faster and more accurate, and a second pair of eyes catches mistakes before orders leave the building.
• Train thoroughly. Cover processes, equipment, systems, how to handle exceptions, and communication, so people aren’t improvising.
• Allow breaks. Tired people make more mistakes, so rest breaks and sensible shift lengths help accuracy as well as morale.
• Recognize accuracy as well as speed. Bonuses, “picker of the month” recognition, and advancement opportunities all help, but reward accuracy and speed together, because rewarding speed alone encourages rushing, and that creates the errors you’re trying to prevent.
• Invite ideas. People close to the work often see improvements first. Collect their suggestions and act on the good ones.
• Use performance data fairly. Share it openly, use it to coach and fix process problems first, and look for patterns before you look at individuals.

Be proactive: conduct regular inventory audits

Regular audits show whether your stock records match what’s on the shelves, and they catch location errors and discrepancies early. Whether you audit daily, weekly, or monthly, consistency matters. When you find discrepancies, dig into the root cause (a process error, a system problem, or a human factor) and fix it so it doesn’t happen again.

Learn more in our inventory audit guide and our guide to inventory cycle counts.

How Get Lowered Cycles reduced mis-picks from 3% to 0.5%

The company: Get Lowered Cycles is a Pennsylvania-based motorcycle parts and accessories retailer founded by Mike and Meg Smith.

The problem: Like many ecommerce start-ups, the business ran into problems with tedious shipping processes and manual inventory entry as it grew.

The fix: Mike and Meg used ShipWorks for shipping and thermal labels, and Linnworks warehouse management (powered by SkuVault) to manage inventory synchronization.

The process: The combination made order fulfillment more efficient and significantly improved quality control through barcode scanning.

The result: The mispick rate dropped from 3% to 0.5%, which let the team fulfill more orders and offer fast, reliable service to their international market.

Read the full story to learn more.

Start preventing picking errors

Success comes down to precision, and that covers more than picking: inventory control, packing, shipping, and every step that affects the customer. The most reliable way to get there is to replace slow, manual processes with systems that check the work as it happens.

Linnworks can help with accuracy at every stage, from warehouse management to shipping and multichannel inventory. See Linnworks warehouse management, or request a demo.

FAQs about picking errors