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Are today's passive-safety systems in cars getting too complex?

J. Marczyk

How complex are today's passive-safety systems in cars? With all the multiple airbags, pretentioners, etc, one might very well ask: are they too complex? Ontonix has recently conducted a study on this issue, utilizing US NCAP data, spanning the period 1980-2005 and which includes nearly 900 physical crash tests. The data has been divided into periods of five years as follows: 80-85, 86-90, 91-95, 96-00 and 01-05. For each test period, a Process Map has been ontained, like the one illustrated below (NB, only a part of a typical map is illustrated). In addition, the corresponding complexity has been computed.

Process Map of US-NCAP crash test

The results are quite surprising. It appears that  the complexity has been increasing substantially, reaching in the last period (2001-2005) a value that is double that of the earlier periods. The most significant increase in complexity - nearly 40% - has been observed between the period 1996-2000 and 2001-2005. The obvious questions at this point are:

  • Is it worth it? Has this increase in system complexity (and cost) really increased safety? If so, in what measure?
  • How complex will passive-safety systems become in the future? Is there a limit?

Comments are most welcome!


by Jacek Marczyk last modified 16-07-2007 15:34
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