Sedas dadast depfae

1
S?ed?asµ?? d?ad?ast???? d?ep?fa?e???

• ?as???? ?????e?

2
?? e??a? t? design

• Design
• Finding the right physical components of a
  physical structure
• A goal directed problem-solving activity
• Simulating what we want to make (or do) before
  we make (or do) it as many times as may be
  necessary to feel confident in the final result
• The imaginative jump from present facts to
  future possibilities
• A creative activity it involves bringing into
  being something new and useful that has not
  existed previously
• Jones, 1981, p.8

3
???e? ?? ßas???? d?ad??as?e?

• Fundamentals two major activities need to be
  undertaken
• The designer must understand the requirements of
  the product
• looking at similar products
• discussing the needs of the people who will use
  the product
• analysing any existing systems to discover the
  problems with current designs
• Must develop the product
• Producing a variety of representations until a
  suitable artefact is produced

4
???d?a??af?? s?ed?asµ??

• Requirements for design
• Example if you think to develop a pottery jug,
  you would first determine the requirements by
  critically examining other jugs and analysing the
  intended users needs and abilities?
• Identify three likely requirements for the jug
• An ability to hold liquids
• It should be light enough for its intended users
  to lift and carry
• It should be capable of pouring liquid

5
???d?a??af?? s?ed?asµ??

• Requirements for design (continues)
• Example continues
• When the requirements are understood
• you may sketch several different shapes
• You may fashion the jug with clay
• You may find problems with your design e.g. the
  jug is too heavy and have an inadequate pouring
  mechanism
• With this process you learn that your design does
  not meet the requirements
• You refine your understanding of requirements
• You refine your design

6
The process of interaction design design

• Representations for design can be formal or
  informal, precise or vague and may be used for
  different purposes within the overall design
  activity
• For complex artefacts a range of representations
  is required, or models
• Model is a representation for something
  constructed and used for a particular purpose
• A good model must be accurate enough to reflect
  the features of the system being modelled, but
  simple enough to avoid confusions
• A good model adopts a style of presentation that
  is suitable for its purpose

7
? d?ad??as?a t?? d?ad?ast???? s?ed?asµ??

• 4 basic activities are involved in interaction
  design
• Identifying needs and establish requirements
• Developing alternative designs that meet those
  requirements
• Building interactive versions of the designs so
  that they can be communicated and assessed
• Evaluating what is being built throughout the
  process

8
?a?a?t???st??? t?? d?ad?ast???? s?ed?asµ??

• 3 key characteristics of the interaction design
  process
• Focus on user - users should be involved through
  the development of the project
• Specific usability and user experience goals
  should be identified, clearly documented, and
  agreed upon at the beginning of the project
• Iteration through the four activities is
  inevitable

9
????? e??a? ? ???st??

• Who the users are?
• What the users want to achieve?
• Who we consult to find out user requirements?
• Those who interact directly with the product to
  achieve a task
• Primary frequent hands-on users of the system
• Secondary occasional users or those who use the
  system through and intermediary
• Tertiary those affected by the introduction of
  the system or who will influence its purchase

10
????? e??a? ? ???st??

• Physical characteristics
• Cultural diversity

11
Reading

• Chapter 6 J., Preece, Y., Rogers H., Sharp
  (2002) Interaction Design, beyond human computer
  interaction, Wiley, 2002, ISBN 0471492787
• Chapter 17 18 J., Preece, Y. Rogers, H.
  Sharp, D. Benyon, S. Holland, T. Carey (1994)
  Human-Computer Interaction, Addison-Wesley, 1994,
  ISBN 0201627698