This lecture introduces the User-Centered Development Discipline, and why it is important in modern development environments.

1. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
Introduction to User-Centred Development
Cristina Cachero
This project has been funded with support from the European
Commission under the Lifelong Learning Programme

2. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 User-Centred Development (a.k.a. User-Centred Design
or Human-Centered Design): approach to system design
and development that aims to make interactive systems
more usable by focusing on the use of the system;
applying human factors, ergonomics and usability
knowledge and techniques (ISO/IEC 9241-210)
 Sometimes you will read human-centred instead of user-centred to emphasize
that all stakeholders, and not only users, need to be taken into consideration
during the process.
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
2
User-Centred Development

3. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 It provides methods and techniques to figure out…
 Specified Users:Who?
 Specified Goals:What?
 Specified Context of Use: In which context?
 … in order to design for them
 … and assure certain levels of…
 effectiveness, efficiency and satisfaction (quality in use)
 … ALL MEASURED AT THE USER INTERFACE LEVEL
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
3
User-Centred Development

4. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
4
User-Centred Development
 User-centered development augments the number of
potential adopters of the product

5. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
5
User-Centred Development
 User-centered development increases the knowledge of
user goals early in the development cycle, when the
design freedom is higher

6. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 User-centered development inverts the development
pyramid, making it easier to predict costs.
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
6
User-Centred Development

7. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 It is made up of three disciplines or workflows:
 User-Centered Analysis (UCA)
 User-Centered Design (UCD)
 Usability Testing (UT)
 It’s an iterative process
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
7
User-Centred Development
Source: ISO 13407

8. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 Process and techniques to discover…
 Who are the users
 How they think and work
 Which are the objectives and aims of the different stakeholders
 Gathers data about:
 User profiles
 Working environment
 Scenarios showing how users interact with the interface
 Tasks
 Content
 Navigation structures
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
8
User-Centred Analysis

9. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 Process and techniques to discover…
 Who are the users
 How they think and work
 Which are the objectives and aims of the different stakeholders
 Gathers data about:
 User profiles
 Working environment
 Scenarios showing how users interact with the interface
 Tasks
 Content
 Navigation structures
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
9
User-Centred Analysis: Process

10. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
 Process and techniques to discover…
 Who are the users
 How they think and work
 Which are the objectives and aims of the different stakeholders
 Gathers data about:
 User profiles
 Working environment
 Scenarios showing how users interact with the interface
 Tasks
 Content
 Navigation structures
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
10
User-Centred Analysis: Techniques

11. 11
UCA
Introducción: Recopilación Información
•¿Cuándo cada técnica?
1. Tipos de datos que se necesita recolectar (tareas, funciones, performance)
2. Nº de personas de las que hay que recolectar datos (<25, >25)
3. ¿Datos específicos o datos de exploración?
4. ¿Hay aspectos complejos involucrados?
5. ¿Se necesitan rápidamente los datos?
6. ¿Hay restricciones severas de presupuesto?
7. ¿Son necesarios muchos datos?
8. ¿Hace falta información sobre errores de usuario?
•¿Ventajas? ¿Inconvenientes?

12. Leonardo da Vinci Partnerships Project
GUI USABILITY AND ACCESSIBILITY:
EXCHANGING KNOWLEDGE AND EXPERIENCES
These slides are made available under the license Creative Commons
Attribution-NonCommercial-NoDerivs CC BY-NC-ND. More
information about license:
http://creativecommons.org/licenses/by-nc-nd/3.0/.
These slides were created under Leonardo daVinci Partnerships
Project 2012-1-PL1-LEO04-28181 GUI USABILITY AND
ACCESSIBILITY: EXCHANGING KNOWLEDGE AND EXPERIENCES (
http://usability-accessibility.org/).
 Instead, how should we design a checkout process?
This project has been funded with support from the European
Commission under the Lifelong Learning Programme
12
Attributions