By,
Robert Larmore
Lisa Paul Palathingal
02/20/2014
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Iterative, evaluation-centered, UX lifecycle
template
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Iterative Process: All or part is repeated for the
purpose of exploring, fixing or refining a design
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Lifecycle: Structured framework consisting of a
series of stages and corresponding activities
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3
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1)
Analyze
2)
Design
3)
Implement
4)
Evaluate
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1)
Analyze
2)
Design
3)
Implement
4)
Evaluate
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Analyze: Understanding the business domain, user
work and user needs
Sub-activities:
 Contextual Inquiry
 Contextual analysis
 Extracting requirements
 Synthesizing design-informing models
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1)
Analyze
2)
Design
3)
Implement
4)
Evaluate
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Design: Creating conceptual design, interaction
behavior, and look and feel
Sub-activities:
 Design ideation and sketching
 Mental models and conceptual design
 Design production
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1)
Analyze
2)
Design
3)
Implement
4)
Evaluate
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Implement: Prototyping
Types:
 Vertical
 Horizontal
 T
 Local
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1)
Analyze
2)
Design
3)
Implement
4)
Evaluate
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Evaluate: Verifying and refining interaction design
Methods:
 Rapid evaluation
 Fully rigorous
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Activities can overlap
Objective:
 Move forward to production
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Team must be able to decide:
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When to leave an activity
Where to go after any given activity
When to revisit a previous process activity
When to stop making transitions and proceed to
production
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Answers depend on transition criterion:
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Whether designers have met the goals and
objectives
Whether there are adequate resources (time and
budget) remaining to continue
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Factors:
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Risk tolerance
Project goals
Project resources
Type of system being designed
Stage of progress within project
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Risk:
 Things going wrong
 Features or requirements being missing
 Not meeting needs of users
The less tolerance for risks, the more need for rigor
and completeness in the process
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Resources:
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Budget
Schedule
Person Power
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Practitioners with extensive experience need less
rigorous process
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Type of system being designed:
Example: mp3 player vs. air traffic control system
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Stage of progress within project:
Early stage: Analysis
Later stage: Evaluation
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About elaborateness of user actions to accomplish
tasks in the system
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Low interaction complexity:
• smaller, easier tasks
• Example: ordering flowers from a Website
High interaction complexity:
• larger, more difficult tasks
• requires special skills or training
• Example: manipulating a color image with Adobe
Photoshop
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