Personnel may intentionally or inadvertently compromise your FCI/CUI environment for many reasons including greed, ideology, mistake, coercion, etc. Ongoing screening helps detect changes in behavior, personal finances, family life, etc. Often, this can help prevent a potential problem before it is too late. When a personnel change is needed (even if the person is simply being transferred elsewhere outside the FCI/CUI environment), procedures must be in place to ensure all hardware is returned, access is revoked, and non-disclosure agreements, if applicable, are maintained.