Block 2 - Lecture 3

Question 1

2 types of concept?

Answer 1

• improvements

- introductions

Question 2

4 steps in each stage of the V-model?

Answer 2

• requirements analysis
• functional definition
• physical definition
• design validation

Question 3

Needs analysis?

Answer 3

• confirms validity
• defines needs
• feasibility
• shows desirable capabilities

Question 4

operational objectives?

Answer 4

• describe the purpose
• system level
• Verb-Noun pairs eg. Brew coffee
• different levels ie. primary, secondary..

Question 5

Scenario development?

Answer 5

setting of the product used to develop requirements

Question 6

functional requirements?

Answer 6

• system capabilities

- derived from the operational objectives

Question 7

physical definition stage?

Answer 7

-checking the functional requirements for feasibility

Question 8

Design validation?

Answer 8

set performace measures

Question 9

what to do if the performance required is unachievable?

Answer 9

repeat needs analysis to reassess needs

Question 10

requirements of a requirement?

Answer 10

• traceable to user need
• not redundant (covered by other requirements)
• not contradicting
• unambiguous
• feasible
• affordable
• verifiable (can be checked)

Question 11

4 types of requirements?

Answer 11

-operational
-functional
performance
-physical

Question 12

4 types of function?

Answer 12

• signal (sensing and communicating)
• data (processing)
• material
• energy

Question 13

3 roles of functions?

Answer 13

• control inputs
• control how inputs are transformed
• control outputs

Question 14

functional decomposition?

Answer 14

'organisational chart' layout
-input
-processing
-output
each with functions off them

Question 15

how to use a functional decomposition to generate concepts?

Answer 15

look at different ways to transform inputs into outputs at a system / subsystem level (in another decomposition)

Question 16

Concept definition stage?

Answer 16

• decide on key characteristics (capability, operational life, cost)
• rate concepts on performance, utility, development risk and cost
• pick a concept

Question 17

functional analysis?

Answer 17

• decompose system into components / supplier sub-systems

- allocate functions

Question 18

uses of computer-based models?

Answer 18

• defining possible configurations
• describing function interactions
• documenting these

Question 19

function block diagram? meanings of each arrowtype and block shape?

Answer 19

• blocks show functions (square) and external agents (rounded corners)
• arrows between them show flow of signals (dotted) materials and energy (solid)

Question 20

Concept selection factors in the physical definition phase?

Answer 20

• operational performance against requirements
• life-cycle costs
• program schedule (service entry and ramp up)
• risk assessment
• compatibility
• reliability
• environmental impact