Part 2 Flashcards
(10 cards)
1
Q
- Because of component inter-dependencies faults can be propagated through the systems
- System failures often occur because of unforeseen inter-relationship between components
- It is probably impossible to anticipate all possible component relationships
- May give a false picture of the system reliability
A
System Reliability Engineering
2
Q
What is the probability of a hardware component failing and how long does it take to repair that component?
A
Hardware Reliability
3
Q
How likely is it that a software component will produce an incorrect output. It is usually distinct from hardware failure in that software does not wear out
A
Software Reliability
4
Q
How likely is it that the operator of a system will make an error
A
Operator Reliability
5
Q
- Hardware failure can generate spurious signals that are outside the range of inputs expected by the software
- Software errors can cause alarms to be activated which cause operator stress and lead to operator errors
- The environment in which a system is installed can affect its reliability
A
Reliability Relationships
6
Q
- Properties such as performance and reliability can be measured
- Some properties are properties that the system should not exhibit
- Measuring or assessing these properties is very hard
A
The “Shall-Not” Properties
7
Q
the system shout behave in an unsafe way
A
Safety
8
Q
the system should not permit unauthorized
A
Security
9
Q
- Specifying, designing, implementing, validating, deploying, and maintaining socio-technical systems
- Concerned with the services provided by the system, constraints on its construction and operation and the ways in which it is used
A
Systems Engineering
10
Q
- Usually follows a “waterfall” model because of the need for parallel development of different parts of the system
- Inevitably involves engineers from different disciplines who must work together
A
The System Engineering Process
