Many modern ISO management system standards share the same structure. This is not a coincidence, but the result of a deliberately developed concept known as the High-Level Structure (HLS).
The High-Level Structure was created to make standards easier to read, understand, and implement. Thanks to this unified approach, organizations can implement several standards at the same time and combine them into a single integrated management system (IMS).
Today, many companies integrate the requirements of ISO 9001, ISO 14001, ISO 45001, and other management system standards. The High-Level Structure significantly simplifies this process.
What It Is
The High-Level Structure of ISO standards is a common framework used for building management system standards.
It defines identical clause structures, terminology, and basic requirements across different ISO standards.
Most modern ISO management system standards follow the same structure:
Scope
Normative references
Terms and definitions
Context of the organization
Leadership
Planning
Support
Operation
Performance evaluation
Improvement
This structure allows organizations to easily compare and align the requirements of different standards.
For example, the clause “Performance evaluation” appears in ISO 9001, ISO 14001, and ISO 45001, and includes activities such as monitoring, data analysis, and internal audits.
Requirements of the Standards
The High-Level Structure itself is not a separate standard. Instead, it is a methodology used by the International Organization for Standardization when developing management system standards.
All modern versions of standards such as ISO 9001, ISO 14001, and ISO 45001 are built according to this framework.
Because of this unified structure, the requirements of different standards can be easily compared and aligned.
For example:
leadership requirements are located in Clause 5 across different standards
planning requirements appear in Clause 6
improvement requirements appear in Clause 10.
This consistency greatly simplifies the implementation of a Quality Management System (QMS) and other management systems.
How It Works in Practice
The main advantage of the High-Level Structure is the ease of integrating multiple standards.
Many organizations implement several management systems simultaneously, such as:
Quality Management System (ISO 9001)
Environmental Management System (ISO 14001)
Occupational Health and Safety Management System (ISO 45001).
In the past, companies often created separate documentation and procedures for each standard. Today, organizations frequently combine these requirements into one integrated system.
For example, a company may use unified procedures for:
control of documented information
conducting internal audits
management review
risk management
corrective actions.
This approach forms an Integrated Management System (IMS) that allows organizations to manage processes and resources more efficiently.
Common Mistakes
Despite the advantages of the High-Level Structure, organizations sometimes make mistakes when implementing multiple standards.
Duplicating documentation
Some companies still create separate procedures for each standard, even though many of them could be combined.
Overly complex documentation
Integration should simplify the management system, not make it more complicated.
Formal integration
Sometimes standards are integrated only on paper, while the organization continues to operate separate processes in practice.
Practical Tips
To use the High-Level Structure effectively, organizations can follow several simple recommendations.
Build the system around processes
Processes should be unified across all standards.
Combine procedures
Processes such as internal audits, nonconformity management, and process improvement can often be described in common procedures.
Use shared performance indicators
Process performance indicators (KPIs) can support the requirements of multiple standards at once.
Conclusion
The High-Level Structure has become an important development in the evolution of ISO management system standards.
It makes standards:
easier to understand
easier to implement
easier to integrate.
Thanks to this unified structure, organizations can combine the requirements of different standards and build integrated management systems that support better process management and continuous improvement.