How to Fix Putaway Errors That Cause 30% of Warehouse Picking Mistakes

The Picking Error Starts Before the Pick

When a warehouse operator pulls the wrong item from the shelf, the error is logged as a "picking mistake." But in most warehouses, the real failure happened hours or days earlier — at the putaway stage, when the incoming stock was first placed into storage.

Here is a typical chain of events:

1. A pallet of 200 units arrives at receiving.
2. The receiver counts the units, checks the PO, and signs off.
3. A forklift driver moves the pallet to "the usual spot" in Aisle 3.
4. No label is printed. No bin location is scanned. No system record is updated.
5. Two days later, a picker is directed to Aisle 3, Rack B, Shelf 2 for 50 units.
6. The units are not there. They are in Aisle 5. Or they were never put away. Or they were put away with a different SKU mixed in.

The picker is blamed for the error. But the picker followed the system. The system was wrong because the putaway was never accurately recorded.

Research from the Warehousing Education and Research Council (WERC) found that 30% of all picking errors can be traced back to putaway mistakes — incorrect placement, missing labels, or unrecorded location changes. Fix putaway, and you fix nearly a third of your picking problems before they happen.

The Three Putaway Failure Modes

1. Memory-Based Placement (No System Guidance)

In small and mid-sized warehouses, putaway is often done from memory. "Put the red widgets in Aisle 3" is not a system rule — it is institutional knowledge carried by one or two experienced staff. When those staff are on vacation, sick, or have left the company, the knowledge disappears. New employees guess. Experienced employees develop their own habits. The result is inconsistent placement that breaks picking accuracy.

Odoo Inventory has a built-in solution: putaway rules. These rules define, per product or product category, the default storage location. When a receipt is validated, Odoo suggests (or enforces) the correct destination. The forklift driver does not need to remember — the system tells them where to go.

2. Unlabeled or Mislabeled Bins

A bin without a label is a bin that does not exist in the system. When a picker is directed to "A3-B2" and finds a shelf with no label, they have three options: search nearby shelves (wasting time), mark the item as out of stock (losing a sale), or pick from the wrong location (creating an inventory discrepancy).

Labels must be:

• Unique: No two bins share the same code.
• Scannable: Barcode or QR code that ties directly to the Odoo location record.
• Visible: Large enough to read from a distance, positioned at eye level.
• Durable: Thermal labels resist fading, moisture, and physical abrasion.

Most importantly, labels must be printed before the putaway happens. If the receiver has to walk to an office, log into a computer, and print labels after the fact, the process will be skipped during busy periods. Labels should be printed at the receiving station, automatically, as part of the receipt workflow.

3. Partial Putaway Without Location Updates

A common scenario: a pallet of 200 units arrives. The warehouse is full. The forklift driver puts 100 units in Aisle 3 and 100 units in Aisle 5, planning to update the system later. Later never comes. The system still shows all 200 units in Aisle 3. A picker is sent there for 150 units. Only 100 are found. The remaining 50 are "lost" — until someone accidentally discovers them in Aisle 5 during a physical count.

Odoo supports partial putaway natively. When receiving, you can split a line into multiple locations. The system tracks exactly how many units went where. But this only works if the process is followed in real time, not reconstructed from memory at the end of the shift.

How to Build a Zero-Error Putaway Process in Odoo

Step 1: Define Your Location Hierarchy

Before you can assign products to locations, you need a location structure that makes sense. A typical hierarchy looks like:

• WH/Stock (the main warehouse)
• WH/Stock/Aisle-A, WH/Stock/Aisle-B, etc.
• WH/Stock/Aisle-A/Rack-1, Rack-2, etc.
• WH/Stock/Aisle-A/Rack-1/Shelf-1, Shelf-2, etc.
• WH/Stock/Aisle-A/Rack-1/Shelf-1/Bin-01, Bin-02, etc.

The depth of your hierarchy depends on your warehouse size and product variety. A 5,000-SKU operation typically needs aisle-rack-shelf-bin. A 500-SKU operation may only need aisle-shelf. The key is consistency — every product should have a unique, unambiguous location.

Step 2: Configure Putaway Rules

In Odoo Inventory, navigate to Configuration > Putaway Rules. Create rules that map products or categories to locations. For example:

• Category "Electronics" → Aisle-A (climate-controlled)
• Category "Fast-Moving" → Aisle-B, Racks 1-3 (near shipping)
• Product "Heavy-Widget" → Aisle-C, Floor Level (weight capacity)

When a receipt is validated, Odoo will suggest the correct location based on these rules. The forklift driver sees the suggestion on their device and confirms the putaway with a scan.

Step 3: Print Location Labels at Receiving

The critical moment is when the product crosses the threshold from receiving to storage. At that moment, you need:

• A label for the product (SKU, barcode, quantity)
• A label for the destination bin (location code, barcode)
• A scan to confirm both labels match the system record

This is where most warehouses fail. They print product labels but not location labels. Or they print location labels but do not scan them. Or they scan but do not enforce a match. Each gap is an opportunity for error.

A proper putaway label workflow looks like this:

1. Receiver validates the PO in Odoo.
2. System generates putaway instructions based on putaway rules.
3. Thermal printer at receiving station prints:

• Product label: SKU, barcode, quantity, lot number (if applicable)
• Location label: Aisle, rack, shelf, bin barcode

Step 4: Enforce Scan Verification

Scanning is not optional. It is the only way to guarantee that the physical world matches the digital record. In Odoo, you can configure operations to require scan confirmation before a move is validated. This means:

• The forklift driver cannot complete a putaway without scanning the destination location.
• The picker cannot complete a pick without scanning the source location and the product barcode.
• Any mismatch triggers an immediate alert, preventing the error from propagating.

This level of control requires barcode hardware — handheld scanners or vehicle-mounted terminals — but the ROI is rapid. Warehouses that implement scan-verified putaway typically see picking accuracy improve from 95% to 99.5% within the first month.

Step 5: Audit and Correct Weekly

Even with perfect processes, drift happens. Products get moved during cycle counts. Emergency putaways bypass the system. Returns are placed in temporary locations and forgotten. A weekly location audit catches these issues before they become picking errors.

Run the "Inventory Accuracy" report in Odoo weekly. It compares system quantities to physical counts by location. Any location with a variance triggers an investigation. Was the putaway recorded correctly? Was there a partial putaway that was never updated? Was a product moved without a transfer order?

The Cost of Bad Putaway (And the ROI of Fixing It)

Let's quantify the problem. A mid-sized warehouse processing 1,000 picks per day with 95% accuracy:

• 50 errors per day (5% of 1,000)
• 15 of those errors (30%) originate from bad putaway
• Cost per error: $15 (rework time + shipping correction + customer service)
• Daily cost of putaway errors: $225
• Annual cost: $58,500

Now, implement scan-verified putaway with printed labels:

• Hardware cost: $2,000 (2-3 thermal printers + handheld scanners)
• Label cost: $0.02 per label × 500 labels/day × 250 days = $2,500/year
• Labor cost: 30 seconds additional per putaway × 200 putaways/day × $20/hour = $8,333/year
• Total first-year cost: $12,833
• Savings: $58,500 - $12,833 = $45,667

The payback period is under 3 months. After that, the warehouse saves $45,000+ annually — and customer satisfaction improves because orders ship correctly the first time.

FAQ

References

1. Warehousing Education and Research Council (WERC) — Benchmarking Studies
2. Odoo Documentation — Warehouse Management and Putaway Rules
3. Supply Chain Management Review — Warehouse Accuracy Benchmarks 2026
4. Logistics Management — Barcode Labeling Best Practices
5. Inbound Logistics — Putaway Strategies for Modern Warehouses