Fine. If you want an acceptable design parameter for expected deaths: 0%.
We do not design civilian, optional, exploratory space missions with a threshold for acceptable fatalities. There is no number of dead astronauts that we can accept as a design goal.
Unforeseeable fatalities can happen, but death rate should not be a predetermined design parameter.
We do not design civilian, optional, exploratory space missions with a threshold for acceptable fatalities. There is no number of dead astronauts that we can accept as a design goal.
Unforeseeable fatalities can happen, but death rate should not be a predetermined design parameter.