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 way that is clear and accessible to all employees. Avoid unnecessary information that employees are already expected to know.

4. **Align with ISO 9001 Standards**: Ensure that all procedures and processes align with ISO 9001 standards, focusing on achieving quality objectives and satisfying customers.

5. **Regular Monitoring and Improvement**: Regularly monitor and measure performance, using audits to assess compliance. Establish a continuous improvement cycle, encouraging feedback and making necessary adjustments.

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

7. **Document Everything**: Document process flows, work instructions, and records to ensure traceability and consistency.

8. **Consider Complexity and Staff Needs**: Consider the complexity of tasks, staff rotation, training needs, and performance issues when deciding what procedures to document.

By following these practices, you can create a robust and effective QMS documentation system that supports ISO 9001 compliance.