AGV and AMR — Two Mobile Robot Technologies in Manufacturing
When manufacturing facilities in Vietnam begin automating internal logistics, the first question is always: should you choose AGV (Automated Guided Vehicle) or AMR (Autonomous Mobile Robot)? These are the two most popular mobile robot technologies today, but they differ fundamentally in how they operate, their cost, and scalability.
This article provides detailed analysis of each technology, direct comparison through specifications, concrete ROI calculations, and recommendations for different types of manufacturing plants in Vietnam.
What is AGV?
AGV (Automated Guided Vehicle) is a self-driving vehicle that moves along fixed guides installed on the factory floor. These guides can be:
- Magnetic tape: Attached to the floor, lowest cost
- Wire-guided: Buried electrical wire under the floor, more durable but higher installation cost
- Laser reflector: Laser reflection from mirrors mounted on walls/pillars
- QR code / barcode on floor: Hybrid approach, more flexible than magnetic tape
AGVs operate on a simple principle: follow the route, stop at stations, perform tasks (pick up/drop off goods), then continue. When encountering obstacles, the AGV stops and waits until the path clears.
Advantages of AGV
- Initial investment cost 30-50% lower than AMR
- Reliable, few complex software failures
- Suitable for repetitive processes with little change
- Easy to maintain — technicians don't need deep AI/robotics expertise
Disadvantages of AGV
- Changing factory layout = must reinstall entire route
- Cannot autonomously avoid obstacles, only stops and waits
- Difficult to scale — adding robots = adding more routes
- Cannot optimize routes in real-time
What is AMR?
AMR (Autonomous Mobile Robot) is a self-driving robot with the ability to self-localize and navigate in space without fixed infrastructure. AMRs use SLAM (Simultaneous Localization and Mapping) technology combined with LiDAR, cameras, and sensors to create maps and find routes autonomously.
When encountering obstacles (people, forklifts, pallets), the AMR automatically finds an alternative route — the major difference from AGVs.
Advantages of AMR
- High flexibility — changing layout requires only remapping
- Autonomously avoids obstacles, operates safely near people
- Easy to scale — adding robots just means adding to the fleet, no infrastructure needed
- Real-time route optimization, higher throughput
Disadvantages of AMR
- 50-100% higher cost than AGV
- Complex software, requires IT team support
- Requires stable WiFi across the entire factory
- Requires initial mapping and calibration time
Detailed Comparison Table: AGV vs AMR
| Criteria | AGV | AMR |
|---|---|---|
| Navigation | Fixed route (magnetic tape, wire, laser) | SLAM + LiDAR/camera, free movement |
| Obstacle avoidance | Stop and wait | Automatically find alternative route |
| Layout flexibility | Low — must reinstall routes | High — remap in 1-2 hours |
| Cost per robot | 200 - 600 million VND | 400 million - 1.5 billion VND |
| Infrastructure cost | High (tape, reflectors, installation) | Low (only stable WiFi needed) |
| Deployment time | 4-8 weeks (including floor work) | 2-4 weeks (mapping + config) |
| Scalability | Poor — adding robots = adding routes | Good — add robots to fleet |
| Maintenance | Simple, mechanical focus | More complex, software updates needed |
| Typical payload | 100 kg - 5 tons | 50 kg - 1.5 tons |
| Speed | 1.0 - 1.5 m/s | 1.5 - 2.0 m/s |
| Average ROI | 18-24 months | 12-18 months |
| Best for | Stable factory, fixed processes | Flexible factory, frequent changes |
ROI Calculation: Example with 10-robot fleet
Assume an electronics manufacturing facility in Bac Ninh needs to transport components between 5 stations, operating 2 shifts/day (16 hours), 26 days/month.
AGV Option (10 vehicles)
| Item | Cost (VND) |
|---|---|
| 10 AGV x 400 million | 4 billion |
| Infrastructure (tape, reflectors, installation) | 800 million |
| Fleet management software | 300 million |
| Installation and training | 200 million |
| Total investment | 5.3 billion |
| Maintenance/year | 250 million |
AMR Option (10 vehicles)
| Item | Cost (VND) |
|---|---|
| 10 AMR x 800 million | 8 billion |
| WiFi upgrade (access points) | 150 million |
| Fleet management software | 500 million |
| Installation, mapping and training | 300 million |
| Total investment | 8.95 billion |
| Maintenance/year | 400 million |
Benefit Comparison
Currently the factory uses 25 workers for logistics at average salary 8 million/month/person = 2.4 billion/year.
- AGV: Replace 20 workers → save 1.92 billion/year → ROI: 2.8 years
- AMR: Replace 23 workers (higher throughput) → save 2.2 billion/year → ROI: 4.1 years (but more flexible for expansion)
However, if the factory plans to change layout 1-2 times/year (very common in electronics manufacturing), the cost to reconfigure AGV each time is 300-500 million — in that case AMR has better ROI.
Vietnamese Manufacturing Context
Electronics Industrial Zone Bac Ninh - Bac Giang
Samsung, Canon, Foxconn and hundreds of satellite factories here are pushing automation. Characteristics:
- Layout changes frequently based on new orders
- Requires clean room in some areas
- High throughput, many SKUs
- Recommendation: AMR — flexible for changing production lines
Auto Industrial Zone Hai Phong - Hai Duong
VinFast, Toyota, Hyundai with more stable production lines:
- Layout rarely changes, fixed lines
- Large payloads (heavy vehicle components)
- Repetitive processes, fixed takt time
- Recommendation: AGV — stable, high payload, low cost
Warehouse / E-commerce
Lazada, Shopee, Tiki expanding warehouses in Vietnam:
- Thousands of SKUs, picking orders constantly change
- Shelf layouts may shift seasonally
- Need high speed, 24/7 operation
- Recommendation: AMR (goods-to-person) — optimize picking rate
Popular AGV and AMR Brands
AMR
- MiR (Mobile Industrial Robots): Danish company, MiR250/600/1350 series. MiR Fleet software is very powerful. Has distributor in Vietnam.
- OTTO Motors (Rockwell Automation): Large-payload AMR (OTTO 1500 carries 1.5 tons). Popular in automotive.
- Geek+: Chinese company, competitive pricing, strong in goods-to-person for warehouses. Deployed in many Lazada/JD warehouses.
- Hai Robotics: Also Chinese, specializes in ASRS (Automated Storage and Retrieval System) combined with AMR.
AGV
- Dematic (KION Group): Large-scale AGV solutions for automotive and FMCG.
- JBT Corporation: Ultra-heavy-payload AGV (up to 250 tons) for steel, paper industries.
- Siasun: Largest Chinese company, competitive pricing, diverse AGV models.
- DS Automotion (KUKA): High-precision AGV for semiconductor industry.
When to Choose AGV? When to Choose AMR?
Choose AGV when:
- Limited budget and need quick ROI
- Transportation process is fixed, rarely changes
- Large payload (> 1 ton)
- IT/robotics team not yet ready
- Factory has flat floor, clear paths
Choose AMR when:
- Factory layout changes frequently
- Need to operate near people
- Want to scale fleet easily in future
- Ready to invest in long-term solution
- Have stable WiFi infrastructure
Trend: AGV becoming "AMRified"
A notable trend: the boundary between AGV and AMR is blurring. Many traditional AGV companies have added obstacle avoidance and flexible navigation features. The term "hybrid AGV" or "AGV with natural navigation" is becoming common. This is good news for Vietnamese factories — you can start with cheap AGV and gradually upgrade to AMR capability.
Fleet Management: Critical Success Factor
Whether choosing AGV or AMR, a often-overlooked factor is fleet management software. When fleet grows to 5+ robots, you need a Robot Fleet Management system to assign tasks, avoid congestion, and optimize performance.
Essential features for fleet management software:
- Task allocation: Automatically assign tasks based on location and battery level
- Traffic management: Manage congestion at intersections
- Real-time monitoring: Dashboard to monitor entire fleet status
- Analytics: Throughput reports, utilization rate, downtime analysis
Conclusion
There's no single right answer to "AGV or AMR?" — everything depends on your specific factory context. Start by analyzing your current transportation process, anticipating layout changes over 3-5 years, and available budget. Many Vietnamese factories are choosing to start small with 2-3 robots, run a pilot for 3-6 months then expand — this is the smartest approach.
