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Lifecycle models. For more info on these models – see text Specific References are in notes view Present the model you think is most appropriate for IXD and Web 2.0 processes. Lifecycle models. Show how activities are related to each other Lifecycle models are: management tools

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Lifecycle models

Lifecycle models

For more info on these models – see text

Specific References are in notes view

Present the model you think is most appropriate for IXD and Web 2.0 processes


Lifecycle models1
Lifecycle models

  • Show how activities are related to each other

  • Lifecycle models are:

    • management tools

    • simplified versions of reality

  • Many lifecycle models exist, for example:

    • From software engineering: waterfall, spiral, JAD/RAD, Microsoft

    • from HCI: Star, usability engineering


A simple interaction design model
A simple interaction design model

Identify needs/

establish

requirements

(Re)Design

Evaluate

Build an

interactive

version

Final product

Exemplifies a user-centered design approach


Traditional waterfall lifecycle

From software engineering

Traditional ‘waterfall’ lifecycle

Requirements analysis

Design

Code

Test

Maintenance


Spiral model barry boehm

From software engineering

Spiral model (Barry Boehm)

  • Important features:

    • Risk analysis

    • Prototyping

    • Iterative framework so ideas can be checked and evaluated

    • Explicitly encourages considering alternatives

  • Good for large and complex projects but not simple ones


Spiral model barry boehm1

From software engineering

Spiral model (Barry Boehm)

From cctr.umkc.edu/~kennethjuwng/spiral.htm


A lifecycle for rad rapid applications development

From software engineering

A Lifecycle for RAD (Rapid Applications Development)

Project set-up

JAD workshops

Iterative design and build

Engineer and

test final prototype

Implementation

review


Dsdm lifecycle model

From software engineering

DSDM lifecycle model


The star lifecycle model

From Human Computer Interaction

The Star lifecycle model

Implementation

task/functional

analysis

Requirements

specification

Prototyping

Evaluation

Conceptual/

formal design


Usability engineering lifecycle model

From Human Computer Interaction

Usability engineering lifecycle model

  • Reported by Deborah Mayhew

  • Important features:

    • Holistic view of usability engineering

    • Provides links to software engineering approaches, e.g. OOSE

    • Stages of identifying requirements, designing, evaluating, prototyping

    • Can be scaled down for small projects

    • Uses a style guide to capture a set of usability goals




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