Survive Your Next Plane Crash

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Surviving Fibromyalgia
A survivable system is a system that will
continue to operate and meet its mission
objectives (i.e., essential services), in a
timely manner, even when the functions of its
components have been compromised. The
determination of what constitutes essential
services is usually based on an organization's
policies and the experience of the decision
makers. For example, an automobile with sound
structural integrity is drivable after a crash. A
business organization with an established
business continuity policy will continue to
provide essential services even after the
integrity of its information systems has been
compromised due to a denial of service attack. A
survivable financial system must be able to
provide secure, confidential, reliable, and
timely services in the event of any failures in
its communication components. The primary
structural elements of a bridge (e.g., the
skeleton) should hold even when other components
fail.
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Policies and acceptable system performance
tradeoffs usually drive a system survivability
goal. A recent article titled Recovering from the
Unthinkable (Heather B. Hayes, Washington
Technology, June 25, 2007) reports on the success
of some organizations including SI-International
Inc., Northrop Grumman, and the National
Institute of Science and Technology (NIST) who
have developed and applied several robust models
for dealing with disaster recovery. These
successful models include system replication,
storing backup systems offsite, and having backup
employees. Self-managing Properties of Survivable
Systems
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Survivability services are those services used to
detect, predict, prevent failures, and support
recovery from system failures. Design of physical
structures such as bridges, buildings, and
roadways demands the inclusion of the
self-managing properties in the fabric of each
structure to ensure survival. To survive, a
system needs to possess four self-managing
properties. These include (i) self-configuring--th
e ability to automatically adapt to changes in
the environment (ii) self-healing--the ability
to detect, diagnose, and react to disruptions
(iii) self-optimizing--the ability to
automatically optimize resource usage to meet
user needs and (iv) self-protecting--the ability
to anticipate/predict, detect, identify, and
protect the system from disruptions.
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Every system must provide an optimum service
level during normal operations. The same system
must also be able to provide essential services
when its components fail due to malicious attacks
or major disasters. Therefore, decision makers
need to integrate the four self-managing
properties into the design and usage/operations
of a product (e.g., a bridge, a building or an
aircraft), a process, or a business model. If at
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