First: establish the requirement
Collect the procurement requirements, identify the required level and assessment type, and clarify the information involved. Assign an executive sponsor, a technical owner, and a documentation coordinator. Write down decisions and unresolved questions before purchasing tools or committing to an assessment schedule.
Next: establish the boundary and assess gaps
Inventory users, assets, providers, and information flows. Compare the implemented environment against the applicable requirements and objectives. Distinguish fully supported implementation from missing controls and uncertain answers. Prioritize changes that affect scope or multiple downstream requirements, such as identity, remote access, and centralized device management.
Then: implement and verify
Assign each gap an owner, due date, dependency, and acceptance evidence. Have the people who operate the system verify changes rather than relying only on a project status update. Update the SSP and procedures to reflect what was actually implemented. Run a readiness review appropriate to the assessment pathway.
Finally: assess and maintain
Complete the required assessment and official affirmation steps with authorized people and organizations. Build continuing compliance into ordinary operations through onboarding, access changes, patching, incident preparation, and recurring review. Use an internal plan suited to your environment; this sequence is planning guidance, not a guaranteed timetable.