The optimal way to implement ISO 9001 is to follow this sequence:
1. Obtain management support
2. Set up project management
3. Set up document management
4. Determine the context of the organization
5. Determine the requirements of interested parties
6. Define QMS scope
7. Write a top-level Quality Policy and Objectives
8. Write a Quality Manual
9. Define QMS procedures and processes
10. Determine Risks and opportunities
11. Determine and apply criteria for the Evaluation of Significant Risks and Opportunities
12. Implement QMS procedures and processes
13. Implement training and awareness programs
14. Operate the QMS
15. Monitor and measure the QMS
16. Carry out an internal audit
17. Perform management review
18. Execute corrective actions

After these steps, your organization is ready to choose a certification body and proceed to the certification audit if it wishes.

Note: Drawing an implementation timeline will depend on the organization's size, complexity, and resistance to change. Insufficient resources allocated to the project are another risk that may influence the implementation time.

Note: These steps are for every kind of organization, irrespective of size or complexity. Size and complexity influence the time needed for each step.