Fault tolerance attributes

Most faults are attributed to poorly machined surfaces causing out-of-specification tolerances, although defective material failures also occur. Inadequate material hardness and poor strength factors contribute to many premature failures. Other common causes are improper coupling selection, improper installation, and/or excessive misalignment. 

The geographical location ofthe sensors and actuators for the CIs and the SCADA system have an inherent potential to be physically damaged in case of a natural event or an explosion. These geographical interdependencies are an underlying attribute of the SCADA architecture and can not be avoided. Mechanisms, such as fault tolerance to data imavail-abiUty, have to be implemented to account for this... 

RAID subsystems can be optimized for performance, highest capacity, fault tolerance, or a combination of these attributes. Different RAID levels have been defined and standardized in accordance with these... 

Dependability is the ability of a system to deliver its intended level of service to its users [5]. Also it can be conceived as the reliance on a system for the quality of services it provides during an extended interval of time. There are attributes, measures, means, and impairments pertinent to dependability. Fault tolerance is one of the... 

The contribution from the computer system group is represented in the Laprie s dependability tree. The authors developed the concept of fault-tolerant computing, based on the idea of dependable service delivering (Avizienis et al. 2004). In this work the dependability of a system is understood as the ability to deliver service that can justifiably be trusted. The service delivered by a system is its behaviour as it is perceived by its user(s) a user is another system (physical, human) that interacts with the former at the service interface. The function of a system is what the system is intended for, and is described by the system specification. Dependability is an integrative concept that consists of three parts the attributes of, the means by, and the threats to which dependability is attained. Dependability attributes ... 

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