Brownfield Logistics: Implementing an ASRS in an existing warehouse

Top 5 arguments for brownfield logistics with ASRS

Retrofitting an existing warehouse with an ASRS can be a cost-effective, strategic alternative to new construction. For example, by implementing 4-way pallet shuttle systems like the ASRS solution Movu atlas, companies maximize their investment in existing buildings and avoid the high costs and lead times of new builds. Key benefits of brownfield automation include:

• Maximizing existing assets: Keep using existing racking, buildings, and space instead of building new - while realizing tangible gains in capacity and efficiency.

• Incremental deployment: Start modularly (e.g., with a single zone) while operations continue. This spreads investment and reduces disruption.

• Faster ROI: No greenfield construction timelines, lower duplicate costs for land and construction. Benefits can be realized sooner.

• Sustainability: Repurposing an existing site is often the greener choice. Using what’s already there significantly reduces waste and the project’s CO₂ footprint.

• Better use of current space: Many warehouses don’t fully exploit their cubic volume. ASRS automation unlocks vertical space and narrow aisles, often doubling storage density - without relocation.

Benefits and Impact for FMCG, 3PL, and Integration Partners

Brownfield automation has sector-specific nuances. Here’s how implementing a 4-way ASRS system in an existing warehouse can benefit fast-moving consumer goods (FMCG), third-party logistics (3PL) providers, and system integration partners:

• FMCG warehouses: Higher throughput, 24/7 operations, FIFO compliance, and accuracy all benefit. Significant efficiency gains in cold storage, too. Example: 6,000 pallet movements per day at an FMCG-focused 3PL with Movu atlas - without service loss.

• 3PL providers: More clients on the same footprint, flexible handling of different pallet types in one system, greater transparency via real-time data - a strong sales argument.

• System integrators: Modular, openly connected solutions (racking, robots, software from a single source) simplify projects, accelerate rollouts, and reduce risk.

Biggest Challenges When Integrating Brownfield ASRS
 

Implementing ASRS in an existing warehouse brings many advantages - but also unique challenges. With good planning they’re manageable, so address them early:

• Building suitability: Check clear height, floor flatness and load capacity, and fire protection. These factors define what’s feasible. Floor remediation or sprinkler upgrades may be sensible.

• Space and layout constraints: Fixed grids, columns, and aisles require clever design. Very narrow aisle or shuttle solutions adapt flexibly. Use a space analysis to identify potential and limits.

• Integration with legacy systems: The ASRS must be cleanly connected to the Warehouse Management System (WMS) and ERP. Robust communication is critical. A WMS upgrade or middleware/WES may be necessary.

• Operational disruption: Phase construction and testing so throughput and safety are maintained - especially under tight service level agreements.

• Change management: Roles change with brownfield ASRS. Build acceptance through training, safety, and clear processes.

• Regulatory compliance: Changes in the warehouse may require rethinking measures such as fire protection, machine safety, fencing, emergency stops, permits, etc.

Planning and Preparing ASRS Retrofits
 

Solid preparation is half the battle in brownfield logistics. ASRS implementation should be thoroughly planned. Key points:

• Define goals and KPIs: Capacity, throughput, accuracy, ROI. Rigorously align the project to the business problem - data-driven.

• Stakeholder alignment: Operations, IT, finance, leadership (and customers for 3PLs). Involve all key stakeholders early and set expectations on all sides.

• Data analysis: SKU profiles, volumes and peaks, pick profiles, occupancy, process times, layout. Surface the main levers in your warehouse.

• Facility assessment: Dimensions, heights, column grid, floor, material flows, IT capabilities. Document what’s needed to identify required adaptations.

• Budget and ROI: Calculate the full package including construction, integration, training, maintenance, modifications. Make payback as transparent as possible.

• Engage experts: Use integrators and consultants for validation, simulation, what-if analysis, and project management.

The right ASRS technology for your warehouse

Choosing the optimal ASRS type and design is crucial - especially in a brownfield setting. The right choice always aligns with operational needs and physical constraints. In short: the technology must match requirements and building limits.

• Pallets vs. small items: For palletized goods, pallet shuttles ASRS are perfect. Movu atlas, for instance, stores and retrieves pallets in multiple deep lanes at high density. For small items, tote/cube systems and goods-to-person are appropriate.

• Throughput requirements: Shuttle systems scale to very high movement rates with multiple shuttles and lifts.

• Structural constraints: Ceiling height limits levels; columns influence aisles. Modularity helps with irregular footprints. Movu atlas is designed specifically for brownfield flexibility.

• Scalability: Choose systems that can grow step by step. Shuttle solutions have a clear edge here.

• Environment and loads: Consider cold storage, pallet types, and weights. Movu atlas operates from −25 °C to +40 °C and carries up to. 1,500 kg per pallet.

Example: 4-way Pallet-shuttle in action: Movu atlas system uses autonomous shuttles (running on rails) to move pallets into high-density racking. The shuttle-based approach minimizes aisle space and scales flexibly by adding shuttles - ideal for retrofitting existing pallet warehouses.

Integration into existing systems and infrastructure

The key success factor in brownfield logistics is the seamless link between software and material flow: the ASRS control layer acts as the execution level and connects via a Warehouse Execution System to the WMS and ERP. Movu OPS orchestrates shuttles and conveyors and provides real-time data via API, for example directly into SAP. On the physical side, material flows must be cleanly integrated. In inbound, this means connecting via conveyors, AGVs or AMRs, and forklifts at defined hand-over points. In outbound, it’s about supplying picking and shipping areas - for example, handing over pallets directly to carton picking stations.

Furthermore, existing infrastructure such as racking, mezzanines, and elevators should be checked and reinforced if necessary - instead of being rebuilt. In parallel, clarify construction areas and space needs; it may be sensible to temporarily relocate inventory and plan a phased build. Before go-live, tests and simulations secure performance: emulations verify throughput, IT handshakes, and failure scenarios. Ramp-up is staggered with reduced volume. Equally important are safety and compliance: integrate safety fencing, light curtains, and emergency stops; update SOPs and training; and connect the system to centralized monitoring.

How to avoid disruptions during implementation

Downtime is expensive. Here’s how to keep operations stable during the process:

• Phased deployment: Build aisle by aisle or block by block; each phase delivers value. Example: six stages with continuous service.

• Parallel operations: Continue manual work until the ASRS is stable, then migrate step by step.

• Smart scheduling: Plan construction and testing for off-peak times and tightly coordinate temporary closures.

• Temporary buffers: Use external storage, trailers, or safety stock, and plan additional labor on call.

• Communication and training: Inform stakeholders early, let teams practice new processes, and build acceptance.

• Fallbacks: Define alternatives in case of delays.

Many successful retrofits show that disciplined phasing and coordination can achieve automation without downtime. One example is Movu Robotics’ project with ODTH in Belgium, where the entire system was deployed in a live warehouse without service interruption by carefully orchestrating installation around ongoing operations.

Scaling and future-proofing the automated warehouse

Brownfield ASRS is primarily introduced to handle growth and future demands. Every retrofit should therefore be designed for scalability and future-readiness from the start. A future-proofed, retrofitted warehouse makes the implementation effort pay off in the long term: benefits accrue today and in the years to come. With a scalable system, the warehouse becomes a living, evolving asset that can respond to business growth and change - creating a warehouse of the future under today’s roof. Key points:

• Modular expansion: Add shuttles for throughput and racking for capacity - with minimal intrusion.

• Software flexibility: WES/WMS must support additional machines, processes, and business models (e.g., e-commerce). AI-driven optimization is another plus.

• Future technologies: Provide interfaces for AGVs/AMRs, robotics, IoT, automatic depalletizing, etc.

• Maintenance and upgrades: Plan preventive maintenance, keep critical spares, ensure software updates and hardware retrofit paths.

• Capacity reviews: Regularly monitor performance data and scale in time (e.g., add shuttles or lifts at \~80% utilization).