What is an Integrated Management System (IMS)?

Many organisations hold more than one ISO certification, but still manage quality, safety and environment as separate systems. Each has its own procedures, documents, audits and management reviews.

An Integrated Management System (IMS) brings these together into one coordinated system. Rather than managing several overlapping processes, an organisation can use a shared approach to meet the requirements of multiple ISO standards.

The most common combination includes ISO 9001 (Quality Management), ISO 14001 (Environmental Management) and ISO 45001 (Occupational Health and Safety Management).

This guide explains how an IMS works, why ISO standards support integration, the benefits for organisations and what auditors need to know.

What is an Integrated Management System?

An Integrated Management System is a single management system designed to meet the requirements of two or more ISO standards.

Instead of maintaining separate processes for quality, safety and environment, an organisation can combine common activities such as document control, internal audits, management reviews and improvement processes.

Integration doesn't mean removing the requirements that make each standard different. It means managing them together wherever practical.

Think about everyday activities such as purchasing equipment, managing contractors, training employees or planning a new project. Each can have implications for quality, safety and environmental performance.

An IMS recognises these connections and helps organisations manage them through a coordinated approach.

Why integration is possible: the Harmonised Structure

ISO management system standards use a common framework known as the Harmonised Structure (HS).

Previously widely referred to as the High-Level Structure (HLS), this framework provides consistent clause numbering, common terminology and shared core requirements across ISO management system standards.

The updated ISO 9001:2026 and ISO 14001:2026 standards align with the latest Harmonised Structure, making integration with other management system standards more straightforward.

The main clauses include:

• Clause 4, Context of the organisation: Understanding internal and external issues, interested parties and the scope of the management system.
• Clause 5, Leadership: Leadership commitment, policy, responsibilities and authorities.
• Clause 6, Planning: Addressing risks and opportunities, setting objectives and planning changes.
• Clause 7, Support: Resources, competence, awareness, communication and documented information.
• Clause 8, Operation: Operational planning and control, including requirements specific to each standard.
• Clause 9, Performance evaluation: Monitoring, measurement, internal audits and management reviews.
• Clause 10, Improvement: Nonconformity, corrective action and continual improvement.

Because these standards share a common structure, organisations can integrate many management system processes rather than developing separate ones for each certification.

However, each standard also contains specific requirements. For example, ISO 14001 addresses environmental aspects and compliance obligations, while ISO 45001 includes requirements for hazard identification and worker consultation and participation.

An effective IMS must address these differences while taking advantage of the requirements the standards have in common.

What does an Integrated Management System look like in practice?

A well-integrated management system typically includes:

• An integrated policy and coordinated objectives covering quality, safety and environmental commitments.
• A coordinated approach to risks and opportunities that addresses the requirements of each standard.
• One document control process for managing documented information across the organisation.
• An integrated internal audit program that evaluates processes against the relevant ISO requirements.
• Combined management reviews that give leadership a complete picture of system performance.
• Shared improvement processes for managing nonconformities, corrective actions and opportunities for improvement.

Processes such as procurement, contractor management, training and operational planning are particularly well suited to integration.

For example, when assessing a new supplier, an organisation can consider product quality, worker safety and environmental requirements through one coordinated process rather than three separate assessments.

What are the benefits of an Integrated Management System?

Organisations adopt an IMS for several practical reasons.

• Less duplication. Shared processes reduce the need to maintain multiple procedures, records and management activities.
• More efficient audits. Integrated internal and external audits can reduce repeated assessments, saving time and potentially reducing certification costs.
• Better visibility of risks and opportunities. Leaders can understand how quality, safety and environmental issues affect each other and make more informed decisions.
• Clearer responsibilities. Employees follow coordinated processes rather than navigating several overlapping systems.
• More effective improvement. Findings from audits, incidents, customer feedback and performance reviews can inform improvements across the whole organisation.

For organisations pursuing multiple ISO certifications, integration can also make ongoing compliance and certification maintenance more manageable.

Common mistakes when integrating ISO Management Systems

Bringing management systems together isn't always straightforward. Some common mistakes include:

• Combining documents without changing processes. Putting three separate systems into one manual doesn't necessarily create an integrated system.
• Allowing one standard to dominate. A quality management system with safety and environment added as an afterthought may not adequately address the requirements of all three standards.
• Overlooking the people doing the work. Processes developed without input from employees can be difficult to follow and may not reflect how work actually happens.
• Missing standard-specific requirements. Common processes can be integrated, but each standard still has requirements that must be addressed.
• Treating certification as the only goal. An IMS should improve how the organisation operates, not simply make it easier to pass an audit.

The most effective integrated systems are designed around how the organisation works, rather than around the individual clauses of each standard.

Auditing an Integrated Management System

Auditing an IMS requires more than completing three separate ISO audits back to back. An effective IMS auditor needs to understand the requirements of each standard, while also evaluating how the organisation's processes work together.

For example, an audit of contractor management might examine supplier approval under ISO 9001, environmental controls under ISO 14001 and contractor safety requirements under ISO 45001.

Rather than assessing each area in isolation, the auditor can follow the process from beginning to end and evaluate how effectively the organisation manages its combined responsibilities.

This approach can make audits more efficient and help identify gaps or improvement opportunities that might be missed when auditing each standard separately. It also requires auditors to have the knowledge and competence to assess the relevant requirements of every standard included in the audit scope.

That takes a different mindset and a different set of skills. Our comprehensive 5-day Integrated Management Systems Lead Auditor course covers how to plan, lead and report on audits across ISO 9001, 14001 and 45001 together. If you want to understand how integrated systems work without progressing to lead auditor training, our Integrated Management Systems Course provides a shorter introduction over 2 days.

For more on why this matters, read the value of IMS auditor training and 5 common pitfalls in auditing an Integrated Management System. If you're newer to the standards themselves, start with ISO 9001 vs ISO 45001 vs ISO 14001: what's the difference?.

Why train with us?

Auditor Training Co is powered by Southpac International Group, with over 20 years as management systems specialists in aviation and other high risk industries. Our auditor training offering has developed as a result of understanding the components of both developing effective management systems for countless organisations, and providing third party auditing of management systems as a JAS-ANZ accredited certification body. Our courses are certified by Exemplar Global and are facilitated by some of the industry's most experienced trainers with auditing backgrounds.

We offer comprehensive training courses for various auditing roles, from those looking to specialise in auditing Integrated Management Systems of Quality, Safety and Environment, to those wanting to learn the skills to conduct effective internal audits or external, third-party audits.