Warehouse Automation Glossary

As supply chains become faster, more complex, and increasingly digital, the language of warehouse automation has grown just as rapidly. From Automated Storage and Retrieval Systems (AS/RS) and shuttle-based solutions to advanced Autonomous Mobile Robots (AMRs), AI-driven picking, and predictive maintenance, understanding the right terminology is key to making informed decisions in today’s logistics landscape.

This glossary was created to provide clear definitions of the most important concepts shaping the warehouse automation market. It brings together both traditional warehouse operations terms (like FIFO, slotting, or cycle counting) and cutting-edge robotics innovations (like Movu atlas, Movu escala, Movu ifollow, and Movu eligo) to give you a complete picture of how warehouses are evolving.

By combining technical explanations with practical context, this resource helps professionals, executives, and logistics specialists navigate the sometimes complex world of automation technologies, intralogistics strategies, and fulfillment optimization. At Movu Robotics, we believe in making automation accessible, modular, and scalable and this glossary reflects that philosophy by turning complexity into clarity.

1. Storage & Retrieval Systems

AS/RS (Automated Storage and Retrieval System)

An AS/RS is a warehouse automation system that uses robotic cranes or shuttles to automatically place and retrieve goods from defined storage locations. These systems maximize vertical space, enable high-density storage (densification), and reduce manual forklift traffic. Commonly found in high-bay warehouses and distribution centers, AS/RS solutions improve throughput, order accuracy, and inventory traceability while lowering labor costs.

Unit-Load AS/RS

A type of AS/RS specialized for palletized or large, heavy loads. Unit-load systems are used in manufacturing warehouses, cold storage, and high-volume distribution centers. They replace manual pallet handling, minimize aisle width requirements, and enable better space utilization, often in environments with Very Narrow Aisle (VNA) racking.

Mini-Load AS/RS

Mini-load systems handle cartons, totes, or small containers, typically weighing less than 300 kg. They are ideal for e-commerce, spare parts, and pharmaceuticals where fast, precise retrieval of smaller items is required. These systems often support goods-to-person order fulfillment, integrating seamlessly with conveyors and shuttle systems.

Shuttle System

A shuttle system uses small, automated vehicles that run along rails in racking to move bins or pallets. They can travel horizontally and vertically when paired with lifts, enabling flexible and scalable storage solutions. Shuttle systems are known for high throughput and are commonly used in fast-moving consumer goods (FMCG), retail distribution, and omnichannel fulfillment.

Pallet Shuttle

A deep-lane storage solution where a motorized shuttle moves pallets within storage lanes, minimizing forklift use inside racks. Pallet shuttles are well-suited for high-density storage of homogeneous products and are often applied in cold storage, beverage distribution, and high-turnover goods.

Bin Shuttle

Bin shuttles automate the handling of totes and small containers, retrieving items quickly for picking or buffering. They support multi-deep storage configurations, allowing high throughput in compact spaces. Bin shuttles are common in e-commerce fulfillment centers where speed and order accuracy are critical.

Stacker Crane

A stacker crane is a rail-guided machine used to move pallets or totes vertically and horizontally within narrow aisles of a warehouse. While stacker cranes were among the earliest forms of warehouse automation, they are less flexible and less efficient than modern AS/RS technologies. They typically operate on fixed tracks, limiting scalability and throughput, and often require significant infrastructure investment. Today, stacker cranes are still used in high-bay warehouses, but they are increasingly being replaced or complemented by more adaptable solutions such as shuttle systems, AMRs, and multi-deep AS/RS designs.

2. Warehouse Transport & Robotics

Conveyor & Sortation

Conveyor systems transport goods within a warehouse, while sortation mechanisms (such as diverters, pushers, or tilt-trays) direct products to the correct destination. These systems streamline material flow, support automated picking and packing, and reduce manual handling errors. They are integral to large-scale fulfillment centers and parcel hubs.

AGV (Automated Guided Vehicle)

AGVs are driverless vehicles that transport materials along fixed routes defined by floor markers, magnetic strips, or wires. They are suited to predictable, repetitive transport tasks such as moving pallets between receiving, storage, and shipping areas. While less flexible than AMRs, AGVs are reliable, cost-effective, and widely used in manufacturing and warehousing.

AMR (Autonomous Mobile Robot)

AMRs are intelligent robots equipped with sensors, AI, and navigation software that allow them to move freely through a warehouse. Unlike AGVs, they do not rely on fixed paths but dynamically calculate optimal routes. AMRs are flexible, scalable, and capable of collaborative tasks, making them essential for modern smart warehouses.

ACR (Autonomous Case-Handling Robot)

Autonomous Case-Handling Robots specialize in moving cases, cartons, or totes within high-density storage grids. ACRs retrieve and deliver containers to picking stations, supporting high-throughput, goods-to-person workflows. They are commonly used in e-commerce and retail fulfillment for their scalability and efficiency.

Goods-to-Person (GTP)

In GTP systems, products are automatically brought to human operators at ergonomic picking stations. This reduces walking, increases picking speed, and improves accuracy compared to traditional methods. GTP can be powered by shuttles, conveyors, or AMRs and is a cornerstone of highly automated warehouses.

Person-to-Goods (PTG)

The conventional order-picking method where workers travel through storage areas to collect items. PTG is still common but inefficient compared to GTP. In hybrid models, PTG is enhanced by technologies like pick-to-light or AMRs (acting as cobots) to reduce walking distances and improve ergonomics.

Pick-Assist AMR

A specialized AMR designed to collaborate with human workers during picking operations. Pick-assist robots guide operators to locations, carry collected goods, or transport orders to packing stations. They help reduce operator fatigue and bridge the gap between manual and fully automated picking systems.

3. Picking Technologies

Pick-to-Light / Put-to-Light

A system where light signals guide workers to the correct storage location (pick-to-light) or indicate where to place items (put-to-light). These visual cues reduce errors, accelerate picking speed, and are particularly effective in high-volume, small-item operations like retail and e-commerce.

Voice Picking / RF Scanning

Voice-directed systems give workers spoken instructions through headsets, allowing hands-free picking. RF scanning uses handheld or wearable barcode readers for verification. Both methods improve accuracy and efficiency, while reducing reliance on paper-based processes.

Batch / Wave / Zone Picking
Advanced picking strategies designed to optimize labor and travel time.

• Batch picking combines items for multiple orders in one trip.

• Wave picking releases groups of orders based on criteria like shipping time.

• Zone picking assigns workers to specific warehouse areas, minimizing travel.
  These strategies are often orchestrated by WMS or WES software.

Slotting

The strategic placement of inventory within a warehouse to optimize picking efficiency. Frequently ordered items (fast movers) are placed in easily accessible areas, while slower movers are positioned further away. Proper slotting reduces travel time, increases productivity, and supports ABC classification.

ABC Classification

An inventory management method that groups items by turnover: A (high-frequency items), B (moderate), and C (low). ABC classification helps warehouses allocate storage space effectively, plan replenishment, and optimize picking workflows.

AR Picking (Augmented Reality Picking)

A technology that uses AR devices, such as smart glasses, to display picking instructions directly in a worker’s field of vision. AR reduces training time, lowers errors, and improves ergonomics by freeing workers’ hands. It is an emerging trend in high-tech, smart warehouses.

4. Software & Digital Systems

Warehouse Management System (WMS)

A WMS is the core software for managing daily warehouse operations, including receiving, inventory tracking, picking, packing, replenishment, and shipping. Modern WMS solutions integrate with automation hardware to orchestrate workflows, optimize labor allocation, and improve order accuracy. In highly automated environments, WMS acts as the central decision-making hub.

Order Management System (OMS)

An OMS manages customer orders across channels, ensuring that order capture, processing, and fulfillment flow seamlessly. It coordinates with WMS, TMS, and ERP systems, providing visibility into order status and inventory availability. An OMS is especially critical in omnichannel retail and e-commerce logistics.

Transportation Management System (TMS)

A TMS is software used to plan, optimize, and monitor the movement of goods across a supply chain. It helps select carriers, consolidate shipments, manage freight costs, and provide real-time delivery tracking. TMS is essential for ensuring cost-efficient and reliable transportation in distribution networks.

Warehouse Control System (WCS)

WCS software manages real-time control of automated equipment such as conveyors, shuttles, and sorters. It ensures smooth execution by directing the movement of goods through material handling subsystems. A WCS works beneath the WMS layer, focusing on equipment-level efficiency and throughput.

Warehouse Execution System (WES)

WES is a software layer that bridges WMS and WCS. It dynamically manages workflows, labor resources, and automation assets in near real time. WES systems are increasingly used in smart warehouses to orchestrate both humans and machines for maximum efficiency.

AI / Machine Learning

Artificial intelligence and machine learning are increasingly used in warehouse automation to enhance forecasting, optimize picking strategies, enable robotic piece-picking, and predict equipment failures. AI-driven algorithms continuously learn from operational data, adapting to changes in demand, labor, and inventory to improve performance over time.

IoT / RFID / Barcode

These technologies enable real-time data capture and traceability in warehouses. IoT sensors track equipment health and asset movement, RFID tags provide wireless identification of goods, and barcodes remain a universal standard for scanning. Together, they form the backbone of digital supply chain visibility and automation.

Digital Twin

A digital twin is a virtual replica of a warehouse, including processes, assets, and material flows. By simulating operations in real time, digital twins enable predictive analysis, capacity planning, and scenario testing. They are key to smart warehouse design and continuous optimization.

5. Performance, Monitoring & Analytics

Cycle Counting

A continuous method of verifying inventory accuracy by counting a portion of stock daily. Unlike annual stocktakes, cycle counting minimizes operational disruption and ensures accurate, real-time inventory visibility. It is often automated in intelligent storage systems.

Buffering / Sequencing

The practice of temporarily holding items before they move to the next process step. Buffering absorbs fluctuations in workload, while sequencing ensures that goods arrive in the correct order for packing, loading, or assembly. Both are essential for smooth warehouse workflows.

Condition Monitoring

A process of continuously checking the health and performance of warehouse assets, such as conveyors, shuttles, and robots. Using sensors and analytics, condition monitoring detects anomalies early, enabling proactive maintenance.

Predictive Maintenance

A data-driven maintenance strategy that uses AI, IoT, and condition monitoring to predict equipment failures before they occur. Predictive maintenance increases uptime, reduces repair costs, and extends the life of automation assets.

KPIs (UPH, LPH, Fill Rate)

Key Performance Indicators (KPIs) are critical for evaluating warehouse efficiency.

• Units Per Hour (UPH): number of items processed per hour.

• Lines Per Hour (LPH): number of order lines completed per hour.

• Fill Rate: percentage of customer demand fulfilled without backorders.
  Tracking KPIs helps warehouses benchmark performance and drive continuous improvement.

6. Supply Chain & Logistics Terms

SKU (Stock Keeping Unit)

A unique identifier for a specific product type or variation. SKUs allow precise tracking of stock across distribution centers and fulfillment networks. Effective SKU management is critical in high-volume e-commerce operations.

Staging

The temporary placement of goods in a holding area before final processing, consolidation, or shipping. Staging helps synchronize inbound and outbound flows, especially in cross-docking and high-throughput facilities.

Lead Time

The total time from order placement to delivery. Shortening lead times is a central goal of warehouse automation, as faster fulfillment directly impacts customer satisfaction and competitiveness.

Supply Chain Visibility

The ability to track inventory, shipments, and workflows in real time across the supply chain. Enhanced visibility improves agility, reduces disruptions, and enables proactive decision-making.

Demand Forecasting

The use of analytics, AI, and historical data to predict future demand patterns. Accurate forecasting helps balance inventory levels, reduce waste, and ensure timely fulfillment.

Reverse Logistics

The process of handling returned goods from customers back to the warehouse for restocking, repair, recycling, or disposal. Reverse logistics has grown in importance with the rise of e-commerce and consumer return policies.

Inventory Turnover

A measure of how often inventory is sold and replaced within a given period. High turnover indicates efficient inventory management, while low turnover may signal overstocking or weak demand.

Just-in-Time (JIT)

An inventory strategy where goods arrive only as needed, minimizing storage costs. JIT requires precise coordination and reliable suppliers, making it best suited for stable, predictable demand environments.

Cross-Docking

A logistics strategy where goods are transferred directly from inbound to outbound vehicles with minimal storage. Cross-docking reduces handling, speeds up delivery, and lowers warehousing costs.

Fulfillment

The complete process of receiving, picking, packing, and shipping customer orders. Efficient fulfillment is at the heart of e-commerce and omnichannel logistics, where speed and accuracy are critical.

Last Mile Delivery

The final stage of the supply chain, delivering goods from distribution centers to end customers. Last mile delivery is often the most expensive and complex step, heavily influenced by e-commerce growth.

Distribution Center (DC)

A facility designed for the storage, handling, and distribution of goods. Modern DCs often incorporate automation to manage high volumes of multi-channel orders efficiently.

3PL (Third-Party Logistics)

External logistics providers that offer services such as transportation, warehousing, and order fulfillment. 3PLs help companies scale operations and expand geographically without building their own logistics infrastructure.

First Expired, First Out (FEFO)

An inventory rotation method ensuring that products with the earliest expiration dates are dispatched first. FEFO is critical in industries such as food, beverage, and pharmaceuticals.

First In, First Out (FIFO)

A stock management principle where the oldest inventory is used first. FIFO minimizes obsolescence and ensures product freshness.

7. Warehouse automation specificities

High Bay Warehouse

A warehouse equipped with tall racking systems, often exceeding 40 meters, requiring automated equipment such as stacker cranes or shuttles. High bay warehouses maximize vertical storage capacity.

Very Narrow Aisle (VNA)

Racking design that minimizes aisle width, allowing greater storage density. VNAs are typically served by specialized forklifts or automated cranes.

Cube Storage

A dense, three-dimensional storage system where goods are stacked within a cube-like grid. Cube storage maximizes space utilization and supports high-volume picking.

Mezzanine

An intermediate floor added inside a warehouse to increase usable space. Mezzanines can host picking areas, offices, or buffer stock zones without expanding warehouse footprint.

Densification

The process of increasing the number of goods stored in a given warehouse footprint, usually through automation such as AS/RS, cube storage, or deep-lane shuttles.

Cobots (Collaborative Robots)

Robots designed to work alongside humans safely, supporting tasks such as picking, packing, or material transport. Cobots combine human flexibility with robotic efficiency.

Robotic Arm Picking

Industrial robotic arms equipped with grippers, suction cups, or AI-driven vision systems to pick individual items. These arms are used for piece picking in e-commerce fulfillment and manufacturing.

Systems Integration

The process of combining different automation technologies, software, and workflows into a unified warehouse system. Systems integrators ensure interoperability and seamless performance across subsystems.

8. Vendor-specific solutions (Movu Robotics)

Movu atlas

Movu atlas is a deep-lane pallet Automated Storage and Retrieval System (AS/RS) designed for high-density pallet storage. Using shuttle technology, Movu atlas enables the efficient handling of pallets within multiple storage lanes, significantly increasing warehouse capacity while reducing the footprint required. It is particularly valuable for industries with large volumes of homogeneous goods, such as food, beverage, or manufacturing. By automating pallet storage and retrieval, Movu atlas minimizes forklift traffic, improves safety, and delivers faster throughput compared to traditional rack systems.

Movu escala

Movu escala is a multi-deep bin shuttle system built for the automated storage and fast retrieval of containers, totes, or bins. It combines vertical lifts with horizontal shuttles to manage storage across multiple levels, optimizing cube utilization in both small and large warehouses. Movu escala is ideal for e-commerce, retail, and spare parts logistics, where order lines are numerous and throughput speed is critical. The system supports high picking efficiency, scalability, and flexibility while reducing human travel time within the warehouse.

Movu ifollow

Movu ifollow is an Autonomous Mobile Robot (AMR) engineered to transport pallets, roll cages, or large loads across warehouses. Unlike older AGVs, Movu ifollow is fully autonomous, capable of dynamic navigation, obstacle avoidance, and efficient routing without requiring floor infrastructure. A key advantage is its ability to operate in cold storage environments, making it suitable for food logistics and pharmaceuticals. By taking over repetitive transport tasks, Movu ifollow reduces manual labor demands, increases worker safety, and enables more efficient material flow across facilities.

Movu eligo

Movu eligo is an AI-powered robotic piece-picking system designed to handle individual items with advanced vision systems and machine learning algorithms. Capable of recognizing a wide variety of SKUs, Movu eligo adapts to irregular shapes, packaging types, and mixed inventory, making it ideal for e-commerce, retail fulfillment, and distribution centers. By automating the most labor-intensive and error-prone picking tasks, Movu eligo increases accuracy, reduces costs, and ensures around-the-clock operation. Its continuous learning capability means performance improves over time, delivering long-term efficiency gains.

Movu Ops

Movu Ops is a high-level software module (WES) that orchestrates warehouse operations by optimizing order planning and task execution across automated systems. It integrates data from Warehouse Management Systems (WMS) and coordinates resources such as shuttles, AMRs, and conveyors. By applying intelligent decision-making, Movu Ops balances workloads, reduces bottlenecks, and increases throughput. It also enables dynamic adaptation to real-time demand changes, ensuring warehouses remain efficient even during peak periods such as seasonal surges or promotions.

Movu Tower

Movu Tower is a fleet and task orchestration engine that manages communication and routing across AMRs, shuttles, and other automation subsystems. Acting as a central brain, it allocates tasks to the right machines, ensures traffic coordination, and maintains smooth flow throughout the warehouse. Movu Tower enhances scalability by allowing facilities to expand their fleet without losing efficiency. With predictive algorithms, it optimizes resource utilization and reduces idle time, making it critical for complex multi-robot environments.

Movu Pilot

Movu Pilot is a device-level execution controller that bridges the gap between warehouse control systems and physical automation subsystems. It ensures reliable communication with individual machines, handling instructions such as movement, lifting, and sorting in real time. By coordinating execution at the machine level, Movu Pilot guarantees consistency, safety, and fault-tolerance across the warehouse floor. This layer of control reduces downtime and simplifies troubleshooting, contributing to overall system resilience.

Plug-and-Play sub-systems

Movu’s plug-and-play subsystems are modular, standardized automation components designed for quick deployment and easy integration. These subsystems allow warehouses to adopt automation incrementally, adding new technologies such as shuttles, AMRs, or picking solutions without the need for complete redesigns. This flexibility reduces upfront investment while future-proofing operations, enabling businesses to scale capacity and functionality as their needs evolve.

Modular automation

Movu Robotics promotes modular automation as a strategy for building flexible, scalable warehouse systems. Instead of relying on a single large installation, modular automation combines standardized components, such as shuttles, AMRs, and picking systems, that can be expanded or reconfigured over time. This approach supports rapid adaptation to market shifts, order volume growth, or changes in product mix. Modular automation reduces risk, accelerates ROI, and ensures warehouses remain competitive in an evolving logistics landscape.