Week 10

Question 1

What is POFOD?

Answer 1

The probability of failure on demand

No. failures / No. tests

Question 2

What are the 3 main activites within the maintenance stage?

Answer 2

Bug fixing

Changes in operational environment (making sure it still works)

Changes in customer’s requirements - adding new features

Question 3

What is the largest proportion of effort directed to in maintenance stage?

Answer 3

Adding or modifying features - changes in requirements

Question 4

What is evolution so expensive?

Answer 4

Difficult to predict change

Teams can be unstable

Code harder to understand as it gets older and bigger

Often SW developer has no responsibility for future maintenance so doesn’t design for change

Question 5

What two “types” are systems classified into?

Answer 5

“S-type” - formally specified, static

“E-type” - real world system

Question 6

What is software configuration management?

Answer 6

Set of management disciplines within a software engineering process to develop a baseline

Question 7

What are the 4 configuration management roles?

Answer 7

Configuration manager

Change control board member

Devleoper

Auditor