Unit 21: Maintenance
LO6: Understand how maintenance issues can
inform design
Failsafe design and redundancy
Learner activity sheet
Activity 1
Engineered systems often incorporate features into their design in order to make them failsafe.
Additional features might also be included in order to provide redundancy.
Explain what is meant by the terms:
1.
Failsafe
2.
Redundancy
Version 1
Activity 2
Look at the photographs below of engineered systems: aircraft, car braking system, rollercoaster and a
lift (elevator).
For each example, give examples of failsafe design features, and features that provide redundancy.
Some features might provide both failsafe and redundancy!
Version 1
Aircraft
Car braking system
Rollercoaster
Lift (elevator)