Functional and non-functional requirements (p.1)

Question 1

How is a functional requirement different to a non-functional requirement?

Answer 1

Functional requirements directly relate to what a system will do.

Non-functional requirements relate to how well a system will behave or what qualitative features (traits or features) it will have.

Question 2

Categorise each requirement as functional or non-functional. (p. 119)

a) A report must print to a printer.

b) All font colours must be green.

c) A discount must be applied to a product.

d) The drone must be able to navigate a path through a maze.

e) The body mass index of a person will be calculated.

f) A typical 6-year old should understand all the words displayed.

g) Button sizes must be big enough for touch-screen capability.

h) Input can be via voice or keyboard.

Answer 2

a) Functional

b) Non-functional

c) Functional

d) Functional

e) Functional

f) Non-functional

g) Non-functional

h) Non-functional