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Tutorial #2: Cost-effective User-Centred Design based on ISO 13407
Nigel Bevan Monday, July 8th, 8:30 AM - 5:00 PM
Keywords:
Abstract:
Learn a structured approach to user centered design, based on
the principles of the International Standard ISO 13407: "Human centered
design processes for interactive systems". A core set of cost-effective
industry-proven methods that support the approach will be described,
together with criteria for selecting appropriate methods.
Targeted Audience: Beginner Intermediate
Length of Tutorial: Full Day
System, Product, or Project Focus: No specific system, product, or project
orientation
Keywords:
- Combining methods
- Standards and/or guidelines
- User-centered design
Learning objectives: Participants will learn
a structured approach to user-centered design based on the principles
of the International Standard "Human centered design processes for
interactive systems" (ISO 13407) and other associated standards.
They will gain practical experience of the key methods needed to
support user centred design. By the end of the day they will have
sufficient knowledge to know how to choose a limited number of appropriate
methods when resources are limited.
How tutorial will be conducted:
The tutorial gives a broad overview of user centred design. The
principles will be illustrated with experience from a case study
and short group exercises applying the methods to the design of
a conference web site to familiarize participants with the key methods.
DETAILED DESCRIPTION OF MATERIAL COVERED BY TUTORIAL AND A SCHEDULE
OF EVENTS WITH TIME ALLOCATION
Introductions
(20 minutes) The purpose of the tutorial will be explained, and
participants will introduce themselves and their expectations of
the tutorial (exact duration will depend on the number of participants).
- What is usability, why is usability important? (20 minutes) Different
meanings of "usability". Purpose of user-centred design and cost
benefits.
- Introduction to user-centred design - ISO 13407 (20
minutes) The ISO 13407 process model will be presented, including
its relationship to existing software development methodologies.
How ISO 13407 can be used in conjunction with ISO 9241 (Ergonomic
requirements for office work with visual display terminals), and
ISO 9126-1 Software quality characteristics and metrics.
- The
user-centred design process A core set of techniques to support
the human-centred design process advocated by ISO 13407.
The techniques have been selected based on their applicability,
maturity, stability, availability, and cost-effectiveness, and have
been used in a wide range of organizations. Other more specialized
methods (that generally require more time and expertise) can be
used in conjunction with these techniques.
- 3.1 Planning (15 minutes)
A stakeholder meeting to identify and agree on the role of usability,
broadly identifying the intended context of use and usability goals,
and how these relate to the business objectives and success criteria
for the system.
- 3.2 Context of use (20 minutes) A workshop to collect
and agree detailed information about the intended users, their tasks,
and the technical and environmental constraints. Task scenarios
A workshop to document examples of how users are expected carry
out key tasks in a specified contexts, to provide an input to design
and a basis for subsequent usability testing. practical exercise
(30 minutes) Introduction to example: development of a conference
web site. Identify the key users, tasks and working environments
and typical scenarios of use.
- 3.3 Specify user and organisational
requirements (20 minutes) Evaluate an earlier version or competitor
system to identify usability problems and obtain measures of usability
as an input to usability requirements. A workshop to establish usability
requirements for the user groups and tasks identified in the context
of use analysis and in the scenarios. practical exercise (20 minutes)
What are the requirements for task time and accuracy? What are the
other usability requirements?
- Design and evaluation
- 4.1 Guidance
and standards (10 minutes) Identify, document and adhere to industry,
corporate or project standards and conventions for screen and page
design.
- 4.2 Expert-based evaluation (10 minutes) Expert and heuristic
evaluation methods.
- 4.3 Paper prototyping (10 minutes) Evaluation
by users of quick low fidelity prototypes (using paper or other
materials) to clarify requirements and enable draft interaction
designs and screen designs to be rapidly simulated and tested. practical
exercise (30 minutes) Design the interaction structure using post
it notes.
- 4.4 Evaluate usability of computer prototype (20 minutes)
Informal usability testing with 3-5 representative users carrying
out key tasks to provide rapid feedback on the usability of prototypes.
Usability testing Formal usability testing with 8 representatives
of a user group carrying out key tasks to identify any remaining
usability problems and evaluate whether usability objectives have
been achieved.
- 4.5 Subjective assessment (10 minutes) Questionnaires
such as QUIS and SUMI.
- Common Industry Format (10 minutes) Use
of the standard reporting format for summative test results.
- Selecting the right method (10 minutes) Selecting the right method.
For each potential method, the tutorial provides information which
includes when the method should be used, the type of results provided,
the number of usability experts and users required, and the typical
range of person days involved. Selection of methods should take
account of these factors in meeting the business priorities for
usability. practical exercise (20 minutes) Select an appropriate
set of methods within the constraints of a limited number of person
days.
- Assuring usability (15 minutes) A comparison will be made
of the relative merits of providing confidence in the usability
of a product by using different forms of usability evaluation or
a user centred design process.
- Conclusions (10 minutes) Other
more specialized methods, sources of more information.
DESCRIPTION
OF MATERIALS (HANDOUTS) The tutorial notes will be supplemented
by reference material and cross-references to a web site of resources.
Sample overheads are attached.
Maximum number of participants Approximately
30.
BACKGROUND OF PRESENTER
Nigel Bevan
Research Manager
Serco Usability Services
Voice: +44 20 74 21 64 74
Fax: +44 20 74 21 64 77
Email: nbevan@usability.serco.com
Dr Nigel Bevan is Research Manager at Serco Usability Services. He has first degrees in physics and psychology, and a PhD in man-machine interaction. Nigel provides consultancy in usability and user centred design. He was technical co-ordinator of the EU MUSiC (Measurement of Usability in Context) project that produced methods for usability measurement. These methods have since been widely applied commercially. He was manager of the TRUMP project that incorporated user centred design into the development processes of two large organisations and the PRUE project that trialed use of the Common Industry format for usability test reports. He currently manages the UsabilityNet project that is establishing a web site of usability resources for use in Europe. He is participating in the usability certification working group with the support of UsabilityNet. Nigel is a Board member of the UPA.
He participates in several international standards groups where he has introduced the concept of quality in use. He contributed to ISO 13407, edited ISO 9241-11 (Guidance on usability) and ISO/IEC 14598-1 (Evaluation of software quality - General guide), and now edits ISO/IEC 9126-1 (Software product quality model) and ISO/IEC 9126-4 (Quality in use metrics).
Nigel has given tutorials on usability, web evaluation and user centred design at international conferences including the Usability Professionals Association, CHI, Interact, HCI International and software quality and software engineering conferences.
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