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- Xref: sparky sci.space:19036 sci.aeronautics:2704
- Newsgroups: sci.space,sci.aeronautics
- Path: sparky!uunet!gatech!darwin.sura.net!cs.ucf.edu!news
- From: clarke@acme.ucf.edu (Thomas Clarke)
- Subject: Re: Subjective Safety Measure(Re: man-rating)
- Message-ID: <1993Jan8.203715.28103@cs.ucf.edu>
- Sender: news@cs.ucf.edu (News system)
- Organization: University of Central Florida
- References: <1993Jan8.173933.12320@ke4zv.uucp>
- Date: Fri, 8 Jan 1993 20:37:15 GMT
- Lines: 38
-
- In article <1993Jan8.173933.12320@ke4zv.uucp> gary@ke4zv.uucp (Gary Coffman)
- writes:
- > In article <1993Jan7.181829.13714@cs.ucf.edu> clarke@acme.ucf.edu (Thomas
- Clarke) writes:
- > >In article <1993Jan7.152456.25477@mksol.dseg.ti.com>
- pyron@skndiv.dseg.ti.com
- > >(Dillon Pyron) writes:
- > >> BTW, the STS [Space Transporation System/the Shuttle]
- > >> is the safest transportation system we have, based on fatalities
- > >> per passenger mile. But who would pay $1 billion apiece for a 747?
- (Please
- > >> attach a smiley to the safety record).
- > >
- > >Does anyone have any idea how various means of transport rate
- > >according to probability of exit. Is the private car better than
- > >a commerical airliner? {Lots of safe little trips would up the
- > >exit probability.}
- >
- > So we have about 1 million exits per
- > fatality on aircraft, probably quite a bit better. Using your measure,
- > aircraft and autos are about equally safe, a non-intuitive result.
- >
- Good analysis! So cars and planes are about equally exit-safe.
- I was trying to get at something like this in my original comments.
- Rationally, planes are the safest way to go from A to B, but
- people are not rational or else there wouldn't be lotteries.
- My guess is that the percieved safety on which people base
- their behavior is something like exit-probability.
-
- Corollary: DC should strive for 1/million fatalties/entry.
- Maybe since its space 1/ten-thousand would do :-)
- Even 1/million is not good enough for some - like John
- Madden and Issac Asimov who refuse to fly.
- --
- Thomas Clarke
- Institute for Simulation and Training, University of Central FL
- 12424 Research Parkway, Suite 300, Orlando, FL 32826
- (407)658-5030, FAX: (407)658-5059, clarke@acme.ucf.edu
-