System Development Methodology

Question 1

What is a methodology?

Answer 1

A coherent set of methods used in carrying out some complex activity

Question 2

Waterfall model

Answer 2

System development flows downwards like a waterfall from one activity to the next in a strict order

Question 3

Waterfall tasks are…

Answer 3

ordered, well defined and one-way

Question 4

How Waterfall works

Answer 4

Documents and deliverables are evaluated then approved. If errors are found, they are rejected and reworked.

Question 5

Requirements for Waterfall

Answer 5

are defined, plan-driven and set in stone

Question 6

Analysis in Waterfall is…

Answer 6

client-driven

Question 7

Developer-driven tasks in Waterfall are…

Answer 7

Design, Implementation, Validation

Question 8

Example of a Waterfall methodology

Answer 8

Structured Systems Analysis and Design Method (SSADM)

Question 9

When to use Waterfall methodology?

Answer 9

Computerising existing manual systems without major changes, Systems not expected to change over time, Processes well understood and defined, Systems rather isolated not integrated

Question 10

3 constraints in Waterfall

Answer 10

Requirements fixed first, Delivery when ready, Cost/Resources expand as needed to meet requirements

Question 11

Advantages of Waterfall

Answer 11

Practical and easy to use, Simple structured approach, Emphasis on documentation, Traceability

Question 12

Disadvantages of Waterfall

Answer 12

It’s slow, Distance from users, Testing is left last, Requires time, resources and cost