Handbook of best practices

Support
(1) Provide basic physical infrastructure to which things can be added or appended without
replacement of the infrastructure; (2) Enable to function or act, does not specifically inhibit or
exclude future capability or modification; (3) Provide assistance to people or systems that
require it.
Survive
Experience an event without major loss of hardware. System may experience loss of
functionality requiring repair to return to normal mode functionality. Also see "operate" and
"sustain". An example would be Solar panels blown out in a 50 year storm, the mooring
remains on station and continues to operate on battery power with reduced sampling and
telemetry.
Sustain
Experience an event (environmental extreme or condition) without permanent loss of normal
mode functionality. System may experience reduction of functionality during event. Also see
"operate" and "survive". Example: Profiler parks on bottom during 25 year storm.
System
A collection of interacting components designed to satisfy a set of requirements.
System Design Life
The period of time commencing from the date of the Final Acceptance that the System is
designed to operate in conformance with the Specifications without the need to replace key
elements.
Technical Environment
Technologies, interfaces and frameworks required to deploy and instantiate a node in the
network. Part of the technical environment is the specification of how to interact with
operational units of nodes for monitoring and management purposes.
Technical Performance Measure
Technical Performance Measure (TPM) is a formal method of measuring the technical
performance of the system design that is implemented and used during the entire course of
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