The Risk
“Never was anything great achieved without danger.” -Niccolò Machiavelli
Risk assessment is an extremely important part of this system as a failure in the life support system could easily result in the loss of the crew, and extremely catastrophic outcome. To deal with this, different high level failure modes were identified and their likeness and consequences are to be mapped. Once this is done, each likely failure can be addressed and prevented before the system is put into production. Upon the decision of the different subsystems, it was possible to do a more detailed analysis of the invalid risk. To do so, an FMECA analysis was conducted for all of the systems as well as hazard identification. The identified hazards were put into a risk matrix and analyzed for their severity and likelihood.
To better understand the interaction between the failure modes, a fault tree was produced to show what could lead to the death of the crew. A few key assumptions were made in the construction of the fault tree. Every failure was assumed to be the worst possible scenario and it was also assumed that the failure went undetected to the point where its effects could be felt.
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Since the file is to complex to be shown here, it can be downloaded in full below: