KS5 - 1.2.3 - Software Development

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• Further Education (Key Stage 5)

KS5 - 1.2.3 - Software Development

System Life Cycle Stages?

Definition

Identify a problem

Feasability Study

Overview of system

Investigation

Research

Shadowing/Observation

Interviewing/Focus groups

Original docs

Questionnaires

Analysis

limits of scope

requirements

Success criteria

Design

Structure diagram

UI design

Algorithms/Pseudocode/flowcharts

data structures, variables, classes etc...

Test plan

Implementation

Coding

In development-testing and remedial actions

Testing

Terminal testing (beta, black box testing)

valid, invalid, boundary, erroneous

End user testing

Installation

Direct

Phased

Parallel

Pilot

Documentation

End user docs

Technical documentation

Evaluation

Against initial criteria

successes, shortfalls

Maintenaince

Perfective

Adaptive

Corrective

Obselesence

Product no longer performs as intended

Waterfall Model

Each step outputs into next

Can iterate between steps

Not user focused

Still used, but superseded

What you follow for Project

Spiral Model

Prototype driven

each loop generates refined prototype

Large scale projects (years to develop)

Small projects would opt for agile methods

SPIRAL

WATERFALL

BOTH

Prototypes

Higher user interaction

Iterative

Has 5 core steps

Large projects

Small projects

Outputs lead in to next stage

TASK (15 mins)

3 groups

• Agile
• Extreme
• Rapid Application Development

Be prepared to deliver:

• What is the approach (how does it work)?
• suitability of it, compared against other approaches

Peer Teach

Summary

Waterfall

Spiral

Agile

Extreme Programming

RAD

Smart Revise

Test