To manage suppliers and external resources in accordance with the QMS requirements of ISO 9001:2015, an organization should:

1. Identify relevant suppliers: Determine the suppliers that provide processes, products, or services that are critical to the organization's QMS.

2. Evaluate suppliers: Establish criteria for evaluating suppliers, such as price, quality, and delivery time. Assess the performance of suppliers based on these criteria and document the evaluation.

3. Control externally provided processes, products, and services: Implement processes to control and monitor the performance of external suppliers. This includes establishing agreements or contracts with suppliers, specifying requirements, and monitoring their compliance.

4. Conduct supplier audits: Perform audits of suppliers to verify their compliance with the organization's requirements and the ISO 9001:2015 standard.

5. Manage risks and opportunities: Identify risks and opportunities associated with suppliers and external resources. Develop plans to address these risks and opportunities, such as finding alternative suppliers or improving the performance of existing suppliers.

6. Plan resources: Determine the resources needed to ensure the effective monitoring and measurement of processes. This includes ensuring that measuring and monitoring resources are suitable and maintained.

7. Continually improve: Use the output from the measuring and monitoring process to make decisions and drive continual improvement in the QMS.

By following these steps, an organization can effectively manage its suppliers and external resources to ensure conformity with the QMS requirements of ISO 9001:2015.