To document processes and procedures in an ISO 9001 compliant QMS, follow these best practices:

1. **Identify and Document Key Processes**: Clearly identify and document the key processes essential for quality management. This includes defining roles, responsibilities, and objectives.

2. **Use a Consistent Structure**: Develop a consistent structure for your documentation, which typically includes the purpose, scope, users, reference documents, process explanation, and records.

3. **Ensure Clarity and Accessibility**: Write documents in a clear and accessible manner, ensuring that they provide enough information for activities to be carried out as planned.

4. **Train Employees**: Train employees on the procedures to ensure alignment with ISO 9001 standards and to facilitate consistent application across the organization.

5. **Monitor and Measure Performance**: Regularly monitor and measure performance, using audits to assess compliance and identify areas for improvement.

6. **Encourage Feedback and Continuous Improvement**: Establish a continuous improvement cycle by encouraging feedback and making necessary adjustments to the processes and procedures.

7. **Engage Leadership**: Engage leadership to drive the QMS and ensure it aligns with business goals.

8. **Document Everything**: Ensure all process flows, work instructions, and records are documented to maintain traceability and consistency.

By following these practices, you can create a robust documentation system that supports the effective implementation and maintenance of an ISO 9001 compliant QMS.