Critical Role and Critical Profile Rules 
Identify individual roles and profiles that pose an access risk to your company. For example, any person who has the role of master database administrator is a risk to your enterprise. Ensure that an employee assigned to this role has been properly authorized. Make sure that you designate the role as a critical role. If your system uses profiles, you may have defined profiles that pose a risk. Make sure that you designate each one as a critical profile.