SI-13 Predictable Failure Prevention
a. Determine mean time to failure (MTTF) for the following system components in specific environments of operation: si-13_odp.01 ; and
b. Provide substitute system components and a means to exchange active and standby components in accordance with the following criteria: si-13_odp.02.
| Parameter ID | Definition |
|---|---|
| si-13_odp.01 | system components |
| si-13_odp.02 | mean time to failure (MTTF) substitution criteria |
Baselines
- L
- M
- H
- P
Guidance
While MTTF is primarily a reliability issue, predictable failure prevention is intended to address potential failures of system components that provide security capabilities. Failure rates reflect installation-specific consideration rather than the industry-average. Organizations define the criteria for the substitution of system components based on the MTTF value with consideration for the potential harm from component failures. The transfer of responsibilities between active and standby components does not compromise safety, operational readiness, or security capabilities. The preservation of system state variables is also critical to help ensure a successful transfer process. Standby components remain available at all times except for maintenance issues or recovery failures in progress.
Control Enhancements 5
- SI-13(01) Transferring Component Responsibilities L M H P
- SI-13(02) Time Limit on Process Execution Without Supervision
- SI-13(03) Manual Transfer Between Components L M H P
- SI-13(04) Standby Component Installation and Notification L M H P
- SI-13(05) Failover Capability L M H P
Related controls 7
- CP-02 Contingency Plan L M H P
- CP-10 System Recovery and Reconstitution L M H P
- CP-13 Alternative Security Mechanisms L M H P
- MA-02 Controlled Maintenance L M H P
- MA-06 Timely Maintenance L M H P
- SA-08 Security and Privacy Engineering Principles L M H P
- SC-06 Resource Availability L M H P