Software quality and the world automobile industry.pdf

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OAKWOOD COMPUTING - SURVIVAL AND AVOIDANCE STRATEGIES FOR SOFTWARE FAILURE
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Title Slide
2000-
"Software quality and the
world automobile industry"
by
Les Hatton
Oakwood Computing, Surrey, U.K. and
the Computing Laboratory, University of Kent
lesh@oakcomp.co.uk
Version 1.1: 24/Mar/2000
© Copyright, L.Hatton, 2000-
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Overview
Overview
v
MISRA-C
v
Future trends
v
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Trends
Recent trends in the automobile industry
include:-
– Very rapidly growing software
deployment
– Software deployment in critical areas
– Use of floating point arithmetic
– The use of C as a standard replacement
language for assembler
– Recognition of the need for safer
language subsets
– Very high cost of failure
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Rapidly growing software
deployment
It is widely recognised that consumer
embedded software systems have been
doubling in size every 18 months.
•
Cars have gone from around 50,000 lines of
assembler to around 250,000 lines of C in
around 5 years, a faster rate of growth than the
average.
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Use in critical areas
As well as ‘ cosmetic ’ areas like memory seats
and in-car entertainment, software is now
widely deployed in critical areas such as:-
•
Air-bags, where the complexity has increased
by about a factor of 10 in 3 years to address
multiple airbags, side as well as front impact,
risk to small passengers and other issues.
•
Braking systems
•
Engine management systems
Accelerator and other pedal control
•
•
Steering
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