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About This Item
Full Description
According to IEC 60050-192:2015, dependability [192-01-22] is the ability of an item to perform as and when required and an item [192-01-01] can be an individual part, component, device, functional unit, equipment, subsystem, or system.
To account for mathematical constraints, this standard splits the items between the individual items considered as a whole (e.g. individual components) and the systems made of several individual items. It provides general considerations for the mathematical expressions for systems as well as individual items but the individual items which are easier to model are analysed in more detail with regards to their repair aspects.
The following item classes are considered separately:
- Systems;
- Individual items:
- non-repairable [192-01-12];
- repairable [192-01-11]:
- with zero (or negligible) time to restoration;
- with non-zero time to restoration.
- Systems:
- state-transition models;
- Markovian models.
- Individual items:
- random variable (time to failure) for non-repairable items;
- simple (ordinary) renewal process for repairable items with zero time to restoration;
- simple (ordinary) alternating renewal process for repairable items with non-zero time to restoration.
This standard is mainly applicable to hardware dependability, but many terms and their definitions may be applied to items containing software.
Cross References:
IEC 60050-192:2015
ISO 3534-1:2006
IEC 61508
EN 61508
IEC 61511
EN 61511
IEC 61025
EN 61025
IEC 61078
EN 61078
IEC 61165
EN 61165
IEC 60605
Replaces BS EN 61703:2002 which remains current
All current amendments available at time of purchase are included with the purchase of this document.