Software engineering triangle

Question 1

what is the SE triangle

Answer 1

Time cost scope at the center is quality

any change to one goal must be compensated for by a change to one or both of the other goals

Question 2

What is YAGNI

Answer 2

You Aint Gonna Need It
- to avoid speculative development
better to build only what you need

Question 3

what is “the crunch”

Answer 3

side effect of other problem and cause burnout - essentially to develop many things in a short time period

Question 4

Software entropy

Answer 4

Measure of code complexity (increase in chaos)

• tends to increase over time
• speculative development adds complexity to the start
• bug fixes and enhancements increase complexity and degrade structure

Question 5

Software entropy makes it hard to …

Answer 5

make changes and fixes

understand the code

Question 6

Cure for software entropy

Answer 6

YAGNI at the start

refactoring (cleaning up) as you go along

Question 7

What is the waterfall method?

Answer 7

series of stages where input from a previous stage flows into the next

Linear, sequential
Teams gather requirements
develop the product
Test to see if spec implemented ocrrectly
affter release, gain insight into what the customer actually wants
would be nice if it worked

Question 8

Two waterfall concepts

Answer 8

software as an engineering discipline - Do it right the first time
The more design time reduces risk