What is high-level structure in ISO standards?

In the ISO standards context, High-Level Structure (HLS) refers to a standardised framework for developing future ISO management system standards to ensure they support each other. This initiative includes common terms, core text, basic definitions, and management system standards requirements. This standardisation enhances compatibility among various management system standards, facilitating their integration with certified bodies and ensuring quality and consistency in producing ISO standards. The HLS comprises the following ten core clauses:

The 10 clauses of the ISO High-Level Structure

Clause 1 – Scope in ISO HLS

Defines the setting of the ISO standard. For example, in terms of quality, the focus is on the customer, while Occupational Health and Safety (OHS) focuses on workers. The management system requirements are generic and applicable to most organisations, regardless of size, type, and product provided.

Clause 2 – Normative references in ISO HLS

Intended to keep numbering aligned and indispensable with other ISO standards. Currently, there are no normative references for the upcoming updates of ISO 14001, ISO 9001, and ISO 45001.

Clause 3 – Terms and definitions in ISO HLS

Each ISO standard will feature general management system terms and definitions as well as those specific to the discipline. Some standards like ISO 14001 and AS/NZS 4801 have already incorporated specific terms and definitions.

Clause 4 – Context of the organisation in ISO HLS

Outlines the internal and external issues that influence organisations. Internal issues include factors like company culture, values, and knowledge. External issues include cultural, economic, technological, and legal factors, which can be local, national, or international.

Clause 5 – Leadership in ISO HLS

Defines the role of top management. Management needs to implement policies ensuring that responsibilities and authorities are clearly defined. They also have a general responsibility for facilitating discipline within the organisation.

Clause 6 – Planning in ISO HLS

Requires implementing a risk-based approach to manage risks and opportunities. It ensures that the integrated management system functions correctly to prevent undesired effects and facilitate improvement.

Clause 7 – Support in ISO HLS

Outlines the resources needed to support the current management system. These resources include a competent workforce, measuring equipment, infrastructure, and a conducive environment.

Clause 8 – Operation in ISO HLS

These are processes for operations, acceptance indicators, and contingency policies for conformance. They replace operational control, hazard identification, product realisation, control of risks, and risk assessment in ISO 9001 and ISO 14001.

Clause 9 – Performance evaluation in ISO HLS

Includes evaluation, data analysis, measurement, monitoring, internal audit, and management review. For instance, ISO 9001 requires monitoring customer satisfaction, while ISO 45001 and ISO 14001 require evaluation for compliance.

Clause 10 – Improvement in ISO HLS

Companies must respond diligently to non-conformities, address incidents, take preventive action, and control consequences. They are also expected to continually improve their management system’s suitability, effectiveness, and adequacy.

Which ISO standards follow the HLS?

Several ISO management system standards follow the High-Level Structure. These include:

• ISO 9001 for quality management;
• ISO 14001 for environmental management;
• ISO 45001 for occupational health and safety;
• and ISO 27001 for information security.

Many newer or updated ISO standards are also developed using the HLS to keep management systems consistent, compatible, and easy to integrate.

Why the High-Level Structure matters

The HLS makes it easier for organisations to manage and integrate multiple ISO standards within one system. Key benefits include:

• Improves integration between quality, environmental, and safety systems.
• Reduces duplication by aligning processes and documentation.
• Ensures consistency in how management systems are structured and maintained.
• Simplifies setup and ongoing management by following a common approach.
• Makes it easier to combine and maintain multiple ISO certifications.
• Increases efficiency by streamlining audits, training, and reviews.
• Encourages continual improvement across all areas of the business.
• Provides clarity for teams and auditors by using a familiar, standardised structure.