These three are international standards developed by the International Organization for Standardization (ISO). Each one focuses on a different aspect of management within an organization — quality, environment, and health & safety.

Here’s a clear breakdown:

🏗️ ISO 9001 – Quality Management System (QMS)

Purpose:
To help organizations ensure that their products or services consistently meet customer and regulatory requirements and to improve customer satisfaction.

Key focus areas:

• Process control and continual improvement

• Customer satisfaction and feedback

• Leadership commitment and employee involvement

• Risk-based thinking and corrective action

Typical use:
Any organization, in any industry, that wants to improve its efficiency and reliability — from manufacturing to services.

🌿 ISO 14001 – Environmental Management System (EMS)

Purpose:
To help organizations minimize their environmental impact and comply with environmental laws and regulations.

Key focus areas:

• Reducing waste, pollution, and resource use

• Managing environmental risks and impacts

• Continuous environmental performance improvement

• Legal compliance

Typical use:
Companies that want to demonstrate environmental responsibility — for example, factories, construction firms, or energy producers.

🦺 ISO 45001 – Occupational Health and Safety Management System (OHSMS)

Purpose:
To create a safe and healthy workplace by preventing work-related injuries and illnesses.

Key focus areas:

• Hazard identification and risk control

• Worker participation and consultation

• Legal compliance with health and safety laws

• Emergency preparedness and continual improvement

Typical use:
Organizations of any size that want to systematically manage workplace safety and protect employee wellbeing.

📊 How They Work Together

Many organizations integrate all three into a single Integrated Management System (IMS) because they share similar structures (based on the ISO “High-Level Structure” framework).
That way, one system can handle:

• Quality (ISO 9001)

• Environment (ISO 14001)

• Health & Safety (ISO 45001)

Would you like me to show a simple comparison table of the three (purpose, main benefits, certification focus)? It can make their differences really clear at a glance.