Re: over-automation with glass cockpits

From:         Pete Mellor <>
Date:         31 Jul 96 12:29:43 
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C. Marin Faure <> writes in response to
John M. Hunt <>:-

> A computer (so far) can't
> anticipate every single variable that can affect an airplane.

After "so far" add "and almost certainly never". The anticipation
is done by the designers of the system, and particularly the software
designers. The software cannot be better than its specification, and
no specification can define behaviour appropriate to all eventualities
in the environment of the aircraft.

Peter Mellor, Centre for Software Reliability, City University, Northampton
Square, London EC1V 0HB, UK. Tel: +44 (171) 477-8422, Fax: +44 (171) 477-8585