[SystemSafety] Interesting new publication about safety for autonomous vehicles

Eric Scharpf escharpf at exida.com
Tue Jul 9 23:43:15 CEST 2019

Hello Thierry and Paul,

Although the analogy to the IEC 61508/61511/62061 SIL terminology can be helpful, the case of humans and cars may be better suited by the comparison to high demand or continuous mode failure. With a SIL 1 performance threshold of < 1 dangerous failure per 100,000 hours (~11 years), for safety instrumented functions acting more than once per year (or mathematically more than once per two proof tests), we should have a better correlation with the varying levels of human driving skill than with the idea of a failure probability of < 10% for a low demand emergency action. Then, when you consider all of the other potential independent (and not so independent) protection layers to prevent any accident, injury causing accidents or fatal accidents, you can make a more effective analysis to compare the human and automated capabilities.

I do not begin to have the experience with human or autonomous driving to conduct this analysis at the level needed, but the initial assumptions which dictate the risk model should be carefully considered. 

Best regards,
Eric Scharpf,
Partner, exida Asia Pacific

-----Original Message-----
From: systemsafety [mailto:systemsafety-bounces at lists.techfak.uni-bielefeld.de] On Behalf Of paul cleary
Sent: Wednesday, 10 July 2019 6:45 AM
To: Coq, Thierry <Thierry.Coq at dnvgl.com>
Cc: systemsafety at lists.techfak.uni-bielefeld.de
Subject: Re: [SystemSafety] Interesting new publication about safety for autonomous vehicles

Hi Thierry 

What is meant by 0.1 risk reduction, do you mean E 01? 

 Could you kindly explain?

Paul Cleary 

Sent from my iPhone

> On 9 Jul 2019, at 19:20, Coq, Thierry <Thierry.Coq at dnvgl.com> wrote:
> Hi all,
> Reading the paper, I wonder if the requirement "as safe as the average driver" is good enough.
> In usual functional safety systems, humans may claim 0.1 reduction of risk where safety-related actions are needed. On the other hand, SIL1 starts at this 0.1 reduction and SIL4 is at 0.0001 reduction of risk.
> In other words, I would expect the community to develop automated systems that are much safer than the average driver, more safe than 99,99% of drivers, myself included, and not more safe that 50% of the drivers. Or it could be that the system of systems (human+automated systems) could achieve that rate of risk reduction, but not the automated systems on their own. In the same topic, there is the question of "giving back control to the human driver with enough time to take action". What would be that time? Some research seems to indicate that this time should be many seconds long, especially if the human driver needs to acquire situational awareness (ie taking his/her eyes off the movie been played on the screen)...
> What do you think?
> Best regards,
> Thierry
> -----Original Message-----
> From: systemsafety 
> <systemsafety-bounces at lists.techfak.uni-bielefeld.de> On Behalf Of 
> Paul Sherwood
> Sent: vendredi 5 juillet 2019 11:35
> To: systemsafety at lists.techfak.uni-bielefeld.de
> Subject: [SystemSafety] Interesting new publication about safety for 
> autonomous vehicles
> A friend mentioned this Intel press release [1] to me earlier this week, and then others pointed me at BMW's equivalent [2]. I believe the referenced paper [3] will be of interest to some folks on this list.
> br
> Paul
> [1]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> businesswire.com%2Fnews%2Fhome%2F20190702005370%2Fen%2FAutomotive-Mobi
> lity-Industry-Leaders-Publish-First-of-its-Kind-Framework&data=02%
> 7C01%7Cthierry.coq%40dnvgl.com%7C3669074c26764527f1d308d7012c03f2%7Cad
> f10e2bb6e941d6be2fc12bb566019c%7C1%7C1%7C636979160869140618&sdata=
> JHhvm7hRXWw12nUbCTDNrBo4sJhNj8tAolSA2%2BSUA00%3D&reserved=0
> [2]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.
> press.bmwgroup.com%2Fglobal%2Farticle%2Fdetail%2FT0298103EN%2Fautomoti
> ve-and-mobility-industry-leaders-publish-first-of-its-kind-framework-f
> or-safe-automated-driving-systems&data=02%7C01%7Cthierry.coq%40dnv
> gl.com%7C3669074c26764527f1d308d7012c03f2%7Cadf10e2bb6e941d6be2fc12bb5
> 66019c%7C1%7C1%7C636979160869140618&sdata=mOmpFpXdfDMdOlXLGi4HjQdq
> oYMKyyERtWNGcSr3%2FoU%3D&reserved=0
> [3]
> https://eur01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fnews
> room.intel.com%2Fwp-content%2Fuploads%2Fsites%2F11%2F2019%2F07%2FIntel
> -Safety-First-for-Automated-Driving.pdf&data=02%7C01%7Cthierry.coq
> %40dnvgl.com%7C3669074c26764527f1d308d7012c03f2%7Cadf10e2bb6e941d6be2f
> c12bb566019c%7C1%7C1%7C636979160869150613&sdata=nG804ZGA37YNbl3OZA
> itFax6yGA4l8%2BWZ72gHmM%2BhJk%3D&reserved=0
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