System Development Methodology Flashcards

1
Q

What is a methodology?

A

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

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2
Q

Waterfall model

A

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

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3
Q

Waterfall tasks are…

A

ordered, well defined and one-way

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4
Q

How Waterfall works

A

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

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5
Q

Requirements for Waterfall

A

are defined, plan-driven and set in stone

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6
Q

Analysis in Waterfall is…

A

client-driven

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7
Q

Developer-driven tasks in Waterfall are…

A

Design, Implementation, Validation

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8
Q

Example of a Waterfall methodology

A

Structured Systems Analysis and Design Method (SSADM)

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9
Q

When to use Waterfall methodology?

A

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

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10
Q

3 constraints in Waterfall

A

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

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11
Q

Advantages of Waterfall

A

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

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12
Q

Disadvantages of Waterfall

A

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

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