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1 - Mission goals and system engineering

Published online by Cambridge University Press:  12 August 2009

Andrew Ball
Affiliation:
The Open University, Milton Keynes
James Garry
Affiliation:
Universiteit Leiden
Ralph Lorenz
Affiliation:
The Johns Hopkins University
Viktor Kerzhanovich
Affiliation:
NASA Jet Propulsion Laboratory
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Summary

Before journeying through the various specific engineering aspects, it is worth examining two important subjects that have a bearing on many more specific activities later on. First we consider systems engineering as the means to integrate the diverse constraints on a project into a functioning whole. We then look at the choice of landing site for a mission, a decision often based on a combination of scientific and technical criteria, and one that usually has a bearing on the design of several sub-systems including thermal, power and communications.

Systems engineering

Engineering has been frivolously but not inaptly defined as ‘the art of building for one dollar that which any damn fool can build for two’. Most technical problems have solutions, if adequate resources are available. Invariably, they are not, and thus skill and ingenuity are required to meet the goals of a project within the imposed constraints, or to achieve some optimum in performance.

Systems engineering may be defined as

the art and science of developing an operable system capable of meeting mission requirements within imposed constraints including (but not limited to) mass, cost and schedule

The modern discipline of systems engineering owes itself to the development of large projects, primarily in the USA, in the 1950s and 1960s when projects of growing scale and complexity were undertaken. Many of the tools and approaches derive from operational research, the quantitative analysis of performance developed in the UK during World War II.

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Publisher: Cambridge University Press
Print publication year: 2007

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