C. Definitionen gemäß IFIP WG 10.4 - Dependability tree 
(Übersetzung ins Deutsche durch Voges et al.) /Laprie1992, Avizienis2001/

1 Dependability (Zuverlässigkeit)

Dependability of a computing system is the ability to deliver service that can justifiably be trusted

1.1  Impairments (Beeinträchtigungen)

1.1.1 Faults (Fehlerursachen)

1.1.2 Errors (Fehlzustände)

1.1.3 Failures (Ausfälle)

A system failure is an event that occurs when the delivered service deviates from correct service. A failure is thus a transition from correct service to incorrect service, i.e., to not implementing the system function. The delivery of incorrect service is a system outage.

1.2  Means (Mittel)

1.2.1 Procurements (Verfahren)

1.2.1.1 Fault prevention (Fehlerverhinderung)

1.2.1.2 Fault tolerance (Fehlertoleranz)

1.2.2 Validation (Validation)

1.2.2.1 Fault removal (Fehlerbeseitigung)

1.2.2.2 Fault forecasting (Fehlervorhersage)

1.3  Attributes (Kenngrößen)

1.3.1 Availability (Verfügbarkeit)

1.3.2 Reliability (Funktionsfähigkeit)

1.3.3 Safety (Sicherheit)

1.3.4 Security (Vertraulichkeit)

the absence of unauthorized access to, or handling of, system state

1.3.4.1 Confidentiality 

1.3.4.2  the prevention of the unauthorized disclosure of information

1.3.4.3 Integrity (Integrität)

1.3.4.4 the prevention of the unauthorized amendment or deletion of information

1.3.4.5 Availability (Verfügbarkeit)

1.3.4.6 the prevention of the unauthorized withholding of information

1.3.5 Maintainability (Instandhaltbarkeit)