EXOMARS is a success (the orbiter is up and running, since 2016) but the experimental lander, failed spectacularly (and the crater where it landed was already located at Mars)... Why was that?
Because of hardware, and also of software:
"The following main weaknesses in the overall process led to the failure of the landing of Schiaparelli:
• Lack of specification and focus on a mission critical parameter from Prime to Supplier. The
persistence of the saturation flag in the application software, became the ultimate cause of the
Schiaparelli landing mishap.
• Lack of rigorous verification approach (including testing of failure/anomaly cases and
recording of closure of requirements).
• Lack of PA/QA rigorousness for acceptance of the unit"
"The following root causes for the mishap have been identified:
- Insufficient uncertainty and configuration management in the modelling of the parachute
dynamics which led to expect much lower dynamics than observed in flight;
- Inadequate persistence time of the IMU saturation flag and inadequate handling of IMU
saturation by the GNC;
- Insufficient approach to Failure Detection, Isolation and Recovery and design robustness;
- Mishap in management of subcontractors and acceptance of hardware."
Source: EXOMARS 2016 - SCHIAPARELLI ANOMALY INQUIRY
More info:
http://exploration.esa.int/mars/59176-exomars-2016-schiaparelli-anomaly-inquiry/
http://www.bbc.com/news/science-environment-40029180
PS. Kudos to A. Santos for pointing this out.
Mostrar mensagens com a etiqueta Software Failure. Mostrar todas as mensagens
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sábado, 27 de maio de 2017
terça-feira, 11 de outubro de 2016
The Biggest Software Flops of All Time - PCMag.com
Right on topic, one interesting feature from the PC Magazine site (Slideshow):
The Biggest Software Flops of All Time - Slideshow from PCMag.com
PS. Have [NOT] fun!
Quoting:
"Software is a funny thing. You can't touch it, but you can certainly pay for it. It weighs nothing, but takes dozens or even hundreds of people to make. And sometimes it just doesn't work out.
No matter how detailed your specs, how solid your market research, and how optimized your code, there are always winners and losers. Sometimes a competitor comes to market with something better. Sometimes unforeseen circumstances make your program useless or outdated. And sometimes you just screw things up to a point that no amount of patching can fix it.
In this feature, we'll crawl through the annals of computing history to showcase 10 software releases that went horribly wrong. Some of the biggest names in the industry show up here—Apple and Microsoft are both well-represented—which proves that there's always a second chance. And a third and a fourth if you play your cards right. For some of the other development houses on this list, though, their software flops sounded the death knell for their businesses."
The Biggest Software Flops of All Time - Slideshow from PCMag.com
PS. Have [NOT] fun!
"Software is a funny thing. You can't touch it, but you can certainly pay for it. It weighs nothing, but takes dozens or even hundreds of people to make. And sometimes it just doesn't work out.
No matter how detailed your specs, how solid your market research, and how optimized your code, there are always winners and losers. Sometimes a competitor comes to market with something better. Sometimes unforeseen circumstances make your program useless or outdated. And sometimes you just screw things up to a point that no amount of patching can fix it.
In this feature, we'll crawl through the annals of computing history to showcase 10 software releases that went horribly wrong. Some of the biggest names in the industry show up here—Apple and Microsoft are both well-represented—which proves that there's always a second chance. And a third and a fourth if you play your cards right. For some of the other development houses on this list, though, their software flops sounded the death knell for their businesses."
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