Concept definition
This section describes the resilience-oriented considerations and activities incorporated in the concept definition stage:
- Basic concepts -
failure,
incidences and
events,
hazards,
faults,
triggers and
errors,
quality,
barriers,
mistakes
- Resilience assurance ... - goals of
resilience assurance
are to reduce both the rate and costs of
incidences (
more ).
- Methodology ... - from
failure model through
defense design to
engineering
- Resilience engineering ... - the relationships between the various disciplines involved in
resilience assurance
- Design confusion ... - due to the designers failure in anticipating the
operators' intention
- Barriers to quality ... - the
rules defining proper behavior in exceptional situations are often designed and tested with less care than required
- Root cause ... - the source for the
failure is the
situation, not the
trigger
- Cost perception ... - constant increases in the magnitude of a stimulus typically evoke smaller and smaller
changes in response
- Human error ... - when and how should we attribute the
failure to the human
operators
- Operator's confusion ... - are due to the designers failure in anticipating the
operators'
perception of the
system
situation
- Design scope - restricting our design to specific expected
states and
events
- Interdisciplinary interaction ...the information flow between the
system developers
- Operational defenses ... -
resilience assurance
features, consisting of
firewalls and
facilitators, in a framework of a virtual
state machine
- Primary resilience ... - the baseline and framework for
resilience assurance, consisting for seven
defense layers
- Design goal ... -
the primary goals, associated with the primary
interaction modes
- Design criteria ... - for procedures employed in different
Interaction Modes, we should use different
Design Criteria
- Design focus ... - the design focus should depend on the operational
situation
- Training goals ... - different training programs should be developed for the different
situations.
- Protection states ...- the transition between the
defenses
(protection layers -
PL ...) in form of a virtual
state machine
- Integrating resilience features ... - the
system is developed in
iterations, in which each iteration involves
operation disrupted by a critical
incidence, followed by investigation
- Tradeoff dilemma and resolution example ... - When the designer, or the
operators, set the
alarm threshold,
they need to trade the rate of
missed alarms with that of
improper alarms (
more ...)
- Accessibility tradeoff ... -
Resilience and
Accessibility are conflicting features.
- Other key concepts -
human factors,
engineering,
scenarios and
modes,
situations and
states,
Updated on 26 Mar 2017.