A correct implementation of the Certification and Accreditation program will help the organization maintain a secure environment on the computer systems.  An establish life cycle will help the organization maintain a properly revised program.

Certification and Accreditation Guidance Development Life Cycle
Phase Task Activity
Development Creation Plan for, research, and write the policy
Review Complete an independent policy review prior to approval
Approval Obtain management approval of the policy
Implementation Communication Disseminate the policy
Compliance Implement the policy
Exceptions Manage cases where full implementation is not possible
Maintenance Awareness Ensure continued awareness of the policy
Monitoring Report and track compliance with the policy
Enforcement Handle violations of the policy
Maintenance Keep the policy current
Disposal Retirement Retire the policy when it is no longer required