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 are necessary for the organization's processes, products, and services.

2. Evaluate suppliers: Establish criteria for evaluating suppliers, such as price, quality, and delivery time. Assess and categorize suppliers based on the level of risk they pose to your operations.

3. Control externally provided processes, products, and services: Implement controls to ensure that externally provided processes, products, and services meet the organization's requirements. This can include supplier audits, certifications, and risk assessments.

4. Document supplier information: Document the evaluation of suppliers and any relevant information about their performance and compliance with the organization's requirements.

5. Plan resources: Determine and provide the necessary resources for establishing, implementing, maintaining, and continually improving the QMS. This can include people, infrastructure, environment, and monitoring and measuring resources.

6. Monitor and measure resources: Establish processes for monitoring and measuring resources to ensure their suitability and effectiveness. Maintain documented information as evidence of fitness for the purpose of the monitoring and measurement resources.

7. Continual improvement: Use the outputs from monitoring and measuring resources to make decisions and facilitate continual improvement of the QMS.

It is important to note that the specific approach to managing suppliers and external resources may vary depending on the organization's size, industry, and specific requirements.