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- Newsgroups: sci.aeronautics.airliners
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!pacific.mps.ohio-state.edu!linac!unixhub!ohare!news
- From: Pete Mellor <pm@cs.city.ac.uk>
- Subject: Re: Airline Software-safety database (RISKS-14.08)
- Message-ID: <airliners.1992.21@ohare.Chicago.COM>
- Approved: kls@ohare.Chicago.COM
- X-Original-Message-Id: <4664.9211221721@csrsun8.cs.city.ac.uk>
- Sender: kls@ohare.Chicago.COM
- Date: Sun, 22 Nov 92 17:21:22 GMT
- Lines: 70
-
- Dave "Van Damme" Ratner <ratner@ficus.CS.UCLA.EDU> writes in RISKS-14.08:
-
- > I am posting this for Robert Ratner, Ratner Associates Inc, which does
- > international consulting in air-traffic control and aviation safety issues.
- > He is looking for a public-accessible data base on software-related incidents
- > in this area. Email correspondence can be sent to me at ratner@cs.ucla.edu.
- > Thanks. Dave "Van Damme" Ratner ratner@cs.ucla.edu
-
- In my experience, all major manufacturers of software keep databases of
- incidents reported by users of their software and the faults ("bugs") which
- give rise to those incidents. I know for a fact that IBM, ICL, DEC, Unisys
- (or whatever it is now), and Sun all do this.
-
- Such a database is essential to their efforts to improve the quality of their
- software by identifying and fixing bugs, and to reduce their maintenance
- workload by informing customers about known problems so that repeated reports
- are suppressed.
-
- The interesting phrase is "public-accessible". If you are a customer of a large
- manufacturer of system or application software, you will almost certainly have
- access to the *relevant* parts of the database (those which concern the
- products you have bought). This will be provided either on-line, or as printed
- or micro-fiche extracts, updated on a regular basis.
-
- The other interesting phrase is "in this area" (i.e., of air-traffic control
- and aviation safety).
-
- The users of safety critical on-board avionics software are the companies that
- buy the aircraft. They are provided with regular information about all sorts
- of design glitches in the aircraft they have bought, including those in the
- software. Such information is provided in the form of "OEBs" (Operating
- Engineering Bulletins), which are distributed to the flight crews.
-
- Information about software faults in safety-critical avionics systems *must*,
- therefore, be kept on a database somewhere. These databases are public in the
- sense that any pilot on that type of aircraft would have access, but Joe
- Public (as far as I know) does not.
-
- Incidents in flight must (or should) be reported via offical channels by the
- crews. These reports drive the manufacturers' quality improvement programmes.
- After the fault which caused an incident has been diagnosed, it may result in
- an OEB or similar, and in a modification.
-
- Databases of such incident reports are not generally widely accessible.
- Published reports sometimes appear, however. In addition, there are channels
- for anonymous reporting of incidents. In the UK, "CHIRP" is such a forum. In
- the US, I believe the FAA used to run such a scheme, but it was compromised
- when the guarantee of anonymity was removed.
-
- For further information I suggest you contact ALPA.
-
- Given the increasing use of safety-critical software, a central database for
- each major application area would be highly desirable, to say the least.
- Obviously, sensitive issues of commercial confidentiality are involved. In
- particular, it may be difficult to obtain corresponding figures for the
- operating time so as to be able to estimate reliability, and it may be
- difficult to correlate incidents with faults, and so determine which incidents
- are due to software.
-
- I stand to be corrected if anyone *does* know of an official channel for
- public access to flight incident and system fault reports.
-
- Regarding ATC incidents, again I am certain that these are recorded, but access
- is not likely to be easy.
-
- Peter Mellor, Centre for Software Reliability, City University, Northampton
- Sq., London EC1V 0HB, Tel: +44(0)71-477-8422, JANET: p.mellor@city.ac.uk
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