Over View Usability Process Overview User-centered Analysis Wire Frame UI Design HTML Prototype 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:

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?

Understand Users Understand user groups Understand their work environment and how they work Understand user’s goals and their problems. Purpose of Usability

Understand Users

Understand user groups

Understand their work environment and how they work

Understand user’s goals and their problems.

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:

Identify business need

Establish technical feasibility

Design system architecture

Implement the system

QA testing

Launch

Maintenance

Traditional software development Vs User-centered development Focus on external attributes (look and feel, interaction) Focus on internal architecture Quality defined by user satisfaction and performance (quality in use) Quality measured by product defects and performance (system quality) Solutions are directed by Understanding the context of use (user, task, work environment) Solutions are directed by functional requirements Technology/developer-driven Traditional software development User - driven User-centered development

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

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 Understand Users Meeting Card Sort Interview Contextual Inquiry Task Analysis Usability Test Focus Group Design Critique

Document the Critical design component Once you have done the User Centered Analysis by any of these methodologies Meeting Interview Card Sort Contextual Inquiry Task Analysis Focus Group Design Critique Usability Test Next step is to document the Critical design components……….

Meeting

Interview

Card Sort

Contextual Inquiry

Task Analysis

Focus Group

Design Critique

Usability Test

What type of UI ? Before prototyping identify what type of UI? Task Based Information Based Role Based Pattern Based Free style

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

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.K [email_address] www.studiolive.in