Quality
Product quality and ISO 9001. Built in from design to use.
Quality at SULO Group extends across the entire lifecycle of our waste collection solutions – from design and manufacturing to delivery, installation and after-sales service.
Our approach combines durable product design, controlled processes and continuous improvement to support reliable performance and a consistent customer experience.
Quality throughout the lifecycle
Quality at every stage. From design to long-term use.
Quality is integrated throughout the lifecycle of SULO Group’s products and solutions. From product development and manufacturing to delivery, installation and after-sales service, each stage contributes to reliable performance and a consistent customer experience.
Design & development
Quality starts before production.
Product requirements, materials and functionality are considered from the development stage to support durability and reliable performance.
Manufacturing
Consistency at industrial scale.
Quality processes support consistent manufacturing performance across our production network, including high-volume production and extensive customisation.
Delivery & installation
Beyond the factory gate.
Reliable delivery and installation connect industrial quality with the requirements of customers and local markets.
Service & after-sales
Supporting long-term performance.
Service and after-sales teams help maintain performance throughout long-term use and address customer issues promptly and efficiently.
Quality management
A systematic approach to quality. Across SULO Group.
Quality is managed through defined processes and continuous monitoring across SULO Group. All Group subsidiaries have implemented a Quality Management System, creating a common foundation for managing and improving quality across our businesses.
Ten SULO Group companies are also certified to ISO 9001 by external auditors, providing independent verification of established quality management practices.
Group subsidiaries
Quality Management Systems are implemented across all SULO Group subsidiaries.
External certification
Ten SULO Group companies are ISO 9001 certified by independent external auditors.
Quality monitoring
All manufacturing sites monitor Customer Quality Rates every month to track product claims and identify opportunities for improvement.
Certifications
Independently certified. From process to product.
External certifications confirm the quality of our processes, our products and the security of our digital solutions.
Quality management
Ten SULO Group companies are certified to ISO 9001 by independent external auditors.
Product standard
Our two- and four-wheeled waste containers are certified to the European standard EN 840 (DIN EN 840 / NF EN 840), including the NF mark in France.
Quality mark
Our two- and four-wheeled waste containers manufactured in Langres and Herford carry the RAL-GZ 951/1 quality mark, including its annex with additional requirements on climate protection, circular economy and resource efficiency.
Information security
Our key digital products are certified for cybersecurity, personal data protection and information system management.
Continuous improvement
From quality data to better performance. A continuous cycle of improvement.
Quality monitoring helps us identify issues and understand their underlying causes. These insights are translated into targeted action plans designed to address root causes and prevent similar issues from recurring.
- MONITOR: Customer Quality Rates (ppm)
- UNDERSTAND: Root-cause analysis
- IMPROVE: Targeted action plans
Customer experience
Quality beyond the product.
Built around the customer experience.
Quality does not end at the factory gate. Across SULO Group, our local organisations support customers through delivery, installation, service and after-sales – helping ensure reliable performance and a consistent experience throughout the relationship.
Customer feedback is an important part of this approach. From 2026, a unified Net Promoter Score (NPS) approach will provide a consistent framework for measuring customer satisfaction across SULO Group and identifying opportunities for further improvement.
Unified NPS approach
Consistent customer satisfaction measurement across SULO Group from 2026.
FAQ
Quality questions.
Is SULO Group ISO 9001 certified?
Yes. Ten SULO Group companies are certified to ISO 9001 by independent external auditors, and all subsidiaries run a Quality Management System.
Which certifications does SULO Group hold?
Ten Group companies are certified to ISO 9001. Our two- and four-wheeled waste containers are certified to the European standard EN 840 (DIN EN 840 / NF EN 840). Those manufactured in Langres and Herford also carry the RAL-GZ 951/1 quality mark, and our key digital products are certified to ISO 27001.
What is the RAL-GZ 951/1 quality mark?
RAL-GZ 951/1 is the German RAL quality mark for waste collection containers. It builds on the European standard EN 840 and sets additional requirements for product quality and durability, which are checked through regular independent monitoring. SULO Group’s two- and four-wheeled waste containers manufactured in Langres and Herford carry the RAL-GZ 951/1 quality mark.
How does SULO Group measure quality?
All manufacturing sites track Customer Quality Rates (in parts per million) every month. From 2026, a unified Net Promoter Score will measure customer satisfaction across the Group.
Quality at SULO
Built for long-term performance. Driven by continuous improvement.
From product design and manufacturing to delivery, service and long-term use, quality is embedded throughout SULO Group.
By combining defined quality processes, continuous monitoring and customer feedback, we work to improve performance, prevent recurring issues and deliver durable solutions our customers can rely on.