Usability Process

Usability Process

Over View

Usability Process Overview

User-centeredAnalysis

Wire Frame

UI Design

HTMLPrototype

Evaluation/Usability Testing Implementation

What is Usability Engineering?

• Effectiveness – Can users achieve what they need by using the product?

• Ease of learning – How fast can a user who has never seen the interface learn to use it?

• Efficiency of use – How fast can users complete tasks?

• Memorability – Can users remember enough to reuse the interface effectively?

• Error prevention – The best way to deal with errors is to design the interface so users do not make errors.

• Satisfaction – How much does the user like using the system?

Usability is about:

• Understand Users• Understand user groups• Understand their work environment and

how they work• Understand user’s goals and their problems.

Purpose of Usability

UCD Isn’t Part of the Project Life Cycle

• Identify business need• Establish technical feasibility• Design system architecture• Implement the system• QA testing• Launch• Maintenance

Traditional flow:

Traditional software development Vs User-centered development

Traditional software development User-centered development

Technology/developer-driven User - driven

Focus on internal architecture Focus on external attributes (look and feel, interaction)

Quality measured by product defects and performance (system quality)

Quality defined by user satisfaction and performance (quality in use)

Solutions are directed by functional requirements Solutions are directed by Understanding the context of use (user, task, work environment)

The UCD Lifecycle

Answer these questions early

Who are my users and how will they perceive the application?

What are the users goals with the Application?

What areas are critical to overall success?

Critical design component

Personas Personas are specific, realistic descriptions

of a imaginary user

Primary Nouns or Things “Things” users take action or manipulate

Primary Nouns connect the tasks with the navigation model.

Scenarios Scenarios are detailed, concrete

description of an activity

They focus on the user’s “story”: what they want to do, why, and what they expect.

Task Design Task design creates streamlined task

flows within the target system

Methodologies to Identify Critical Design Components

Meeting Card Sort Interview

Contextual Inquiry

TaskAnalysis

Usability Test Focus Group

Design Critique

Understand Users

Once you have done the User Centered Analysis by any of these methodologies

•Meeting

•Interview

•Card Sort

•Contextual Inquiry

Document the Critical design component

•Task Analysis

•Focus Group

•Design Critique

•Usability Test

Next step is to document the Critical

design components……….

What type of UI ?

Before prototyping identify what type of UI?

• Task Based

• Information Based

• Role Based

• Pattern Based

• Free style

Way to Usable design

•Understanding end users’ needs

•Defining interaction

•Designing the user interface (UI)

- will increase the usability & satisfaction of the user with the application

Thank You……

Ramesh.Krameshuxm@gmail.com

www.studiolive.in