What Is End-of-Line (EOL)
End-of-line, or EOL, refers to everything that happens after primary packaging. Primary packaging is the bag, pouch, bottle, or carton that touches the product. EOL takes those primary packages and groups them into shippable, palletized loads.
EOL has four operations: case packing (putting primary packages into corrugated cases), palletizing (stacking cases onto pallets), stretch wrapping (securing the pallet load), and pallet labeling (applying shipping labels, SSCC labels, and any customer-specific marks).
EOL automation is the largest capital component of a modern packaging line. It typically represents 30-45% of total line cost. The reason is labor. EOL is the most labor-intensive part of packaging in manual operations. A line with automated filling and sealing but manual EOL still needs 4-6 operators per shift for case packing and palletizing. EOL automation reduces that to 1-2 operators, which is where the ROI lives.
For the broader line context see the Production Line pillar. For upstream integration see filling, sealing, and labeling integration, and for facility planning see line layout and floor plan and energy and compressed air.
Case Packing: Wraparound vs Top-Load vs Side-Load
Case packing groups primary packages into corrugated cases (RSCs, or regular slotted cartons). Three case packing architectures dominate.
Wraparound case packers form the corrugated blank around the product group. A flat corrugated blank is fed from a magazine, folded around the product group, and sealed with hot-melt adhesive on the bottom and top flaps. The case fits tightly around the product because it is formed to the product, not pre-erected. Wraparound suits rigid products in shelf-ready formats: beverage bottles, cartons of milk, cans of pet food, trays of jars. Speed is 30-60 cases per minute. Cost is $120,000-$250,000.
Top-load case packers (drop packers) erect a blank RSC, position it below the product group, and drop the product group into the case from above. Top-load suits pouches, bags, and fragile product that cannot be pushed sideways. Drop height is 50-200mm. Speed is 30-120 cases per minute depending on configuration. Cost is $150,000-$350,000. Top-load is the most flexible architecture: handles pouches of varying size, multiple bag counts per case, and irregular product shapes.
Side-load case packers erect a blank RSC and push the product group horizontally into the open side of the case. Side-load suits rigid products that slide easily: cartons, trays, tubes, cans in trays. Speed is 40-80 cases per minute. Cost is $130,000-$280,000.
Selection rule: product geometry dictates packer architecture. Pouches and bags go top-load. Cartons and trays go side-load. Bottles and cans in shelf-ready formats go wraparound. Match the packer to the product, not the other way around.
Hot-melt adhesive is the dominant case sealing method for wraparound and many top-load applications. Tape is used on RSC cases where reclosure matters (retail returns) or where hot-melt is undesirable (frozen or refrigerated products where condensation affects hot-melt bond).
Palletizing: Manual vs Robotic vs Conventional
Palletizing stacks filled cases onto pallets in a defined pattern. Three modes.
Manual palletizing uses a human operator to lift cases from a conveyor and stack them on a pallet by hand. Cost: minimal ($5,000-$15,000 for the pallet station and conveyor). Productivity: 4-8 cases per minute sustained, less at end of shift as fatigue sets in. Operator injury rate is high (back, shoulder) and workers' compensation claims are frequent. Manual palletizing is acceptable below 10 cases per minute, above which it becomes a bottleneck and a safety issue.
Conventional palletizers are mechanical machines that form pallet patterns using a layer-by-layer build. Cases accumulate on an infeed conveyor, a layer former arranges them into the pallet pattern, and a hoist or pusher places each completed layer onto the pallet. Conventional palletizers run 30-120 cases per minute depending on size and complexity. They are large (footprint 6x6m or more), inflexible (pattern change requires mechanical adjustment), and expensive ($250,000-$600,000). Conventional palletizers suit single-product, high-volume lines running 24/7.
Robotic palletizers use a 4-axis or 6-axis articulated robot (ABB, FANUC, KUKA, Yaskawa) with a custom end-of-arm tool to pick cases and place them on the pallet. Speed is 8-30 cases per minute per robot. Multiple robots in parallel run higher speeds. Capital cost is $150,000-$300,000 per cell installed. The advantages over conventional: small footprint (3x4m), pattern flexibility (recipes stored in the controller, change in seconds), and scalability (add a second robot cell to double throughput).
For most packaging lines running 30-60 cases per minute, robotic palletizing is the right choice. Below 15 CPM, manual is acceptable. Above 80 CPM with single-SKU 24/7 operation, conventional may still win on throughput.
A common configuration is a single robotic cell handling two pallet positions. While the robot builds pallet A, the full pallet A is being stretch-wrapped and removed, and pallet B is being built. This doubles robot utilization without doubling cell cost.
Stretch Wrapping and Labeling
Stretch wrapping secures the pallet load for transport. A stretch film (LLDPE, 12-25 microns thick) is wound around the pallet and load under tension, binding the cases together and to the pallet.
Turntable stretch wrappers rotate the pallet while the film carriage moves vertically. Cost is $8,000-$25,000. Throughput is 30-60 pallets per hour. Turntable is the standard for typical packaging operations.
Rotary arm stretch wrappers keep the pallet stationary while a rotating arm dispenses film. Used for very light or unstable loads that would topple on a turntable. Cost is $20,000-$50,000. Throughput is 40-80 pallets per hour.
Robotic stretch wrappers are autonomous mobile robots that drive to the pallet, wrap it, and drive to the next pallet. Used in distributed warehouses where centralized wrapping is impractical. Cost is $35,000-$80,000. Throughput is 15-30 pallets per hour.
Film usage per pallet is 200-400g depending on load dimensions and wrap count. Top sheet applicators add a film cap to protect the top of the load from dust and rain. Cost is $5,000-$12,000 add-on.
Pallet labeling applies shipping labels, SSCC (serial shipping container code) labels, and any customer-specific labels. The labeler typically applies one label to two adjacent sides of the pallet (the so-called two-side labeling for visibility from any approach angle). Cost is $25,000-$60,000. Throughput is up to 120 pallets per hour. Label printers can be integrated for on-demand label printing with variable data (lot, expiry, customer, destination).
Cost-Benefit of EOL Automation
The case for EOL automation is built on labor savings, injury reduction, and throughput consistency.
Direct labor savings. A fully manual EOL line (case erect, pack, seal, palletize, wrap, label) requires 4-6 operators per shift. At $45,000-$60,000 fully loaded per operator, that is $180,000-$360,000 per shift per year. Three shifts: $540,000-$1,080,000. An automated EOL line requires 1-2 operators per shift for supervision and exception handling. Direct savings: $400,000-$900,000 annually on a 3-shift operation.
Injury reduction. Manual palletizing is the number one source of musculoskeletal injuries in packaging operations. Each injury averages $35,000-$75,000 in direct medical and indemnity cost, plus indirect costs (temp labor, training, lost productivity) that are 3-5x the direct cost. A single avoided injury per year saves $150,000-$400,000 fully loaded.
Throughput consistency. Manual operations slow as operators tire. A manual palletizing line running 12 CPM at the start of shift may run 8 CPM by end of shift. Automated EOL runs the same speed hour after hour. For a 16-hour operation, the integrated throughput gain is 15-25%.
Capital cost ranges for EOL automation. Case erector $30,000-$60,000. Case packer $120,000-$350,000. Case sealer $15,000-$35,000. Palletizer (robotic) $150,000-$300,000. Stretch wrapper $8,000-$50,000. Pallet labeler $25,000-$60,000. Conveyors and controls $50,000-$150,000. Total EOL automation: $400,000-$1,000,000.
Typical ROI. 18-36 months for full EOL automation on a 2-3 shift operation. 36-60 months on a single-shift operation, often not justified at single shift unless injury reduction or product damage reduction tips the balance.
Worked Example: 30-CPM EOL Configuration
A real EOL configuration for a frozen food line running 30 cases per minute of frozen vegetable pouches into shippers.
Equipment list. Case erector (30 CPM, RSC 300x200x150mm to 500x350x250mm): $42,000. Top-load drop packer with servo pick head, 4 pouches per case, 12-minute changeover: $245,000. Top and bottom hot-melt sealer, 35 CPM rated: $28,000. Static case checkweigher for missed-pouch detection: $18,000. FANUC LR Mate 200iD robotic palletizer cell, 30 CPM, recipe-driven pattern change in 30 seconds: $215,000. Automatic pallet dispenser (15-pallet capacity): $22,000. Turntable stretch wrapper with top sheet, 8 wraps in 45 seconds: $18,000. Two-side pallet labeler with integrated thermal printer for SSCC and customer labels: $38,000. Conveyors, line control PLC, HMI, safety interlocks: $90,000.
Total EOL cost: $716,000.
Performance: 30 CPM sustained, 1 operator per shift. Pallet changeover is automatic every 60-90 cases. The operator monitors HMI alerts, refills the case magazine every 30 minutes, refills the pallet dispenser every 2 hours, and clears the rare jam.
Labor savings: $472,500 per year. Manual equivalent: 4 operators per shift, 3 shifts, $52,500 loaded per operator = $630,000 annually. Automated: 1 operator per shift, 3 shifts = $157,500 annually.
Payback: 18 months on labor alone. Add 2 avoided injuries per year at $200,000 fully loaded each and payback drops to 12 months.
This is a typical 2026 configuration. Robotic palletizer prices have dropped 20-25% since 2022 and case packer prices have stabilized. The economics now favor automation on lines running just 15-20 CPM, where 3 years ago the break-even was 25-30 CPM.
Integration with WMS and AGVs
The most automated EOL operations integrate with warehouse management systems (WMS) and automated guided vehicles (AGVs).
WMS integration. The WMS tells the EOL line what to build: which product, which case count, which pallet pattern, which customer, which ship-to location. The line control PLC receives build instructions from the WMS at the start of each production run. The pallet labeler prints the SSCC label with data provided by the WMS. When the pallet is wrapped and labeled, the line control PLC notifies the WMS that a finished pallet is ready for pickup.
AGV integration. An AGV (also called an autonomous mobile robot, or AMR) picks up the finished pallet from the stretch wrapper and transports it to the warehouse staging area or to a dock door for loading. The AGV receives its mission from a warehouse control system (WCS) that coordinates scheduling across the entire fleet. AGVs navigate by LiDAR, vision, or magnetic strip in the floor. Payload capacity is typically 1,000-1,500kg for pallet moves.
Handoff protocol. The palletizer builds the pallet at a fixed position (the pallet build station). When the pallet is complete, the palletizer signals WCS that a pallet is ready at position X. The WCS dispatches an AGV to position X. The AGV arrives, lifts the pallet from the build station, and transports to the stretch wrapper. The AGV sets the pallet on the turntable, the wrapper wraps it, and the AGV picks up the wrapped pallet and continues to the warehouse.
AGV economics. A single AGV for pallet movement costs $80,000-$150,000 depending on payload and navigation complexity. A fleet of 4-8 AGVs typically replaces 3-6 forklift operators across 2-3 shifts, with annual savings of $300,000-$700,000. ROI is 18-30 months for AGV fleets in addition to EOL automation.
WCS integration cost. Plan $50,000-$150,000 for WCS software and integration on top of AGV hardware. WCS handles traffic management (avoiding collisions), charge management (AGVs returning to charge), mission scheduling, and integration with the WMS. Without WCS, AGVs cannot coordinate and the fleet stalls.
The most automated packaging operations in 2026 run case-packed and palletized product from the line directly to the dock with zero human touch after the case packer infeed. The capital to build such a line runs $1.5-$3 million for EOL alone, but the operating cost is essentially zero per case packed. The lines that justify this are 24/7 operations with stable SKU sets and throughputs above 60 CPM. Below that, semi-automated EOL with manual stretch wrap and manual pallet transport is usually more economic.
The decision sequence: automate case packing first, then palletizing, then stretch wrapping, then AGV transport. Each step has its own ROI threshold and adds incrementally to the fully-automated EOL vision.