Lecture 20 Flashcards
(10 cards)
1
Q
Engineering Design Mistakes
A
- May come in many forms
- Design decisions
- Ignoring safety measures
- Failure to anticipate events
2
Q
Challenger Spacecraft
A
- Jan 27th 1986
- O rings failed
- Became brittle under 53 Degrees F
3
Q
Ford Explorer and Firestone Tires
A
- 1990, Ford introduced new explorer
- Tires delaminate at speed (due to flexing and lack of common reinforcement)
- Ford: Firestone bears sole responsibility
4
Q
Ocean Ranger
A
- Drilling of east coast 1982
- Ballast control room flooded a porthole 28’ above waterline
- Inquest poor training, insufficient safety, equipment design flaws
5
Q
Ignoring Safety Measures
A
- Trends in road safety have improved from ENG design
6
Q
Laval Overpass
A
- Sept 2006
- Overpass collapsed, killing 5 people and injuring 6
- Maintenance was overlooked in the building process of the design
7
Q
Chernobyl
A
- April 1985
- 30 km deadzone, 10k casualties
- Runaway reaction and nuclear meltdown
- Poor training, design flaws
8
Q
What is safe?
A
- Deemed safe is the risks are judged and acceptable
- Judgement can be formalized by laws and regulations
- Judgement is not always formalized, as your judgement also counts
- Override aim is to protect public safety
9
Q
Hazard
A
- The consequence of an event
- eg. Disease, technological failure, accidents, sociopolitical
10
Q
Risk Assesment
A
- Weighing the risk vs hazard
- What is deemed acceptable?
- Cost Benefit analysis: What is a life worth?
