Warehouse Relabeling Project Case Study Results

A warehouse can have reliable inventory software and experienced operators yet still lose time on every shift because location labels are inconsistent, damaged, or difficult to scan. This warehouse relabeling project case study examines a representative distribution operation that replaced an aging mix of handwritten, laser-printed, and thermal labels with a controlled, scan-ready labeling system.

The project was not a cosmetic cleanup. It addressed location identification, barcode readability, replenishment discipline, and the practical question that determines whether a relabeling effort succeeds: can the warehouse make the change without interrupting shipping?

The Operating Problem

The facility stored approximately 7,500 active SKUs across selective pallet racking, carton-flow lanes, shelving, bulk floor locations, and returns areas. Its original labels had been applied over several years by different teams. Some rack locations used 4-inch by 6-inch thermal transfer labels. Others used letter-size laser sheets cut down by hand. Overflow locations were often marked with temporary paper signs or marker-written tags.

The warehouse management system contained valid location records, but the physical label standard had deteriorated. Operators encountered barcodes with low contrast, labels installed on uneven rack beams, and duplicate location codes caused by old labels that had not been fully removed. At receiving, associates regularly had to verify a putaway location visually after a scanner failed to read it. Pickers sometimes keyed locations manually, increasing the chance of transposition errors.

Management initially treated the issue as a supply replacement. A site walk showed that the real issue was control. The team needed a label specification, a numbering convention, installation rules, and a deployment sequence that could be repeated in future expansions.

Warehouse Relabeling Project Case Study: Project Scope

The relabeling plan divided the facility into five functional areas: reserve pallet storage, forward pick locations, case-pick shelving, staging lanes, and exception inventory. Each area required a different label format because viewing distance, surface type, handling conditions, and scan angle varied.

Reserve locations were assigned large-format rack labels with a human-readable location code and Code 128 barcode. The barcode was sized for handheld scanning from a normal working distance, rather than forcing lift operators to move closer to the rack beam. Forward pick faces received smaller thermal transfer labels that fit the available beam space without covering existing safety markings. Carton-flow lanes used labels with a stronger adhesive selected for the lane material and frequent carton contact.

The project also separated permanent location labels from temporary operational labels. Receiving, quality hold, cycle count, and returns zones used distinct color-coded headers paired with readable black text and barcodes. Color alone was never treated as the identifier. This matters because lighting, dust, distance, and color vision differences can make color-only systems unreliable.

Before ordering materials, the warehouse verified printer compatibility. Existing thermal transfer printers could produce the permanent rack and shelf labels, while laser-compatible sheet labels were reserved for low-volume office and document applications. This avoided a common failure point: buying labels that fit the intended surface but do not run correctly through the equipment already on the floor.

Why one label stock was not enough

A single label material sounds easier to purchase, but it can create problems across a mixed warehouse. A label that adheres well to smooth painted steel may lift from corrugated plastic totes. A large rack label may be ideal for a high bay but oversized for a narrow pick bin. Direct thermal labels work well for short-life shipping and receiving applications, while permanent warehouse locations usually need a more durable thermal transfer construction.

The team standardized where possible, but not at the expense of fit. It used a limited set of approved formats, adhesives, and ribbon combinations. That balance kept purchasing manageable while giving each location type a label built for its actual conditions.

Planning Before Printing

The project began with a physical audit rather than a print run. Supervisors exported the WMS location master, then compared it with every active physical position. They identified inactive locations, duplicate labels, damaged rack beams, missing check digits, and spaces that had become informal overflow storage.

The audit produced a corrected location file with a fixed naming convention. Each code followed a clear sequence for zone, aisle, bay, level, and position. For example, a label could identify a specific pick face without relying on a worker's interpretation of handwritten abbreviations.

A pilot was then installed in two aisles. Operators scanned labels using the same handheld devices used during normal picking and replenishment. The test included different shift conditions, including lower lighting and high-traffic periods. Several labels that scanned correctly at arm's length performed poorly when mounted behind pallet overhangs. The installation position was adjusted before the larger rollout.

This pilot also answered a practical question about barcode symbology. The site retained Code 128 because it matched existing WMS workflows and scanner configuration. A relabeling project is not automatically the right time to change barcode standards. If the current symbology is supported, readable, and integrated with the system, improving print quality and placement may deliver better results with less operational risk.

Installation Without Stopping Shipping

The warehouse could not close aisles for an entire day. The rollout therefore followed a phased schedule, completed one zone at a time during lower-volume windows. Each completed zone was validated before the next began.

Installers removed obsolete labels rather than applying new labels over unknown old ones. Where residue could affect adhesion, rack surfaces were cleaned and allowed to dry. Labels were applied at a consistent height and orientation, with barcode quiet zones kept clear of rivets, seams, and beam edges.

The validation process had three steps. First, an installer matched each printed location code to the approved location file. Second, a supervisor scanned the barcode and confirmed the returned value. Third, an associate performed a live WMS transaction from the location. That final test mattered because a barcode can scan successfully but still contain a data-entry or formatting error.

The warehouse used a controlled exception log for locations that could not be relabeled immediately. For example, a bay blocked by active replenishment or a location requiring rack repair received a temporary indicator and was scheduled for follow-up. Exceptions were not treated as minor paperwork. They were assigned an owner and a completion date, preventing gaps from becoming permanent.

Measured Results After the Conversion

Over the first eight weeks, the facility tracked scan exceptions, manual key entries, replenishment corrections, and picker travel interruptions. The figures below are representative of the type of outcomes a well-executed relabeling project can produce, not a guarantee for every operation.

Scan exceptions at permanent storage locations fell substantially because damaged and low-contrast labels were eliminated. Manual location entry also declined, which reduced opportunities for keystroke mistakes. Supervisors reported faster training for new associates because the same code structure and label placement appeared throughout the building.

The largest operational gain came from fewer small delays. A picker no longer had to pause to ask whether a faded label read A-01-08 or A-01-06. A lift operator no longer had to rescan a bent rack label several times before confirming a putaway. Individually, those interruptions lasted seconds. Across hundreds of daily transactions, they affected throughput and labor planning.

There were trade-offs. Larger labels improved visibility but required more care around rack safety labels and load plaques. Higher-performance materials increased unit cost compared with basic paper labels. The operation accepted those costs in the locations where failure created repeat labor, while using lower-cost formats for short-term staging and internal paperwork.

What Made the Project Hold Up

The project succeeded because it established a maintenance standard, not because it completed a one-time installation. The warehouse documented approved label sizes, material types, printer settings, ribbon pairings, barcode rules, and installation positions. It also kept a small inventory of replacement labels and materials for damaged locations and new rack additions.

For facilities with multiple label requirements, a supplier that can support thermal transfer, direct thermal, die-cut sheet labels, integrated forms, custom sizes, and specialized adhesives can reduce sourcing gaps. USLABEL.NET supports American-made label configurations for common office and commercial printing systems, which is useful when a warehouse needs both standard stock formats and a more specific material or size.

A relabeling project should begin with a walk through the actual warehouse, scanner in hand. The right label is the one that reads reliably, fits the surface, matches the printer, and remains understandable to the operator working the next shift.