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Evolution of MCAD User Interfaces: Experiences and Challenges

Explore the evolution of MCAD user interfaces, from Ivan Sutherland's Sketchpad to modern voice and tablet recognition systems. Learn about user reactions and the future of CAD UIs. Contribute to the network for a deeper understanding of technology innovations.

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Evolution of MCAD User Interfaces: Experiences and Challenges

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  1. Multimedia CAD user interfaces: experiences andchallenges Usability Engineer

  2. Introduction Dreams of the (CAD) users: • Powerful • Easy to use • Easy to learn MCAD applications are difficult to learn user interfaces.

  3. MCAD Applications Typically MCAD applications are significantly more complex than most business/office applications: • Represent the real world with its complexity • Designed for specialists • Large and complex menu structure  Complex user interface

  4. CAD UI Evolution 1963: Ivan Sutherland presents a thesis on "Sketchpad" which allows interactive graphics (70’s): Function call like: draw line p0(0,0) p1(1,0) (first half 80’s): Menu bar + numerical input (2D system) (end 80’s): Menu bar + graphic input (first half 90’s): Button icons and dialog boxes (3D system)

  5. User Reaction • Many users still work by typing the function name!! • Big opposition to graphical interfaces, because • Exact name of the command is in their mind • Search for menu item or button wastes time • Speech could be the answer: say what you are thinking!

  6. Voice = Speed Voice = Speed, Space Voice = Speed, Space, Focus • Speed • Parallel inputs • Command in mind • Space • More space for the graphic • Focus • On the graphical area • To create the object

  7. After Two Years... ...only a little number of users still use the Speech: less than 5% • They don’t believe on this technology • They can’t use a natural language • They work into open-space offices • They want more languages

  8. New Possible Frontier Tablet PC (presented by MS in Las Vegas on Nov, 2000)

  9. Sketch Recognition 4^ step: the system build the sweep 1^ step: draw free-handed 3^ step: draw for a feature 2^ step: the system recognize and build the shape

  10. Our Contribution In order not to lose our advantage in technology innovations, we must always maintain the attention of the sector. The partecipation to this network offers therefore the possibility for us to contribute with our experience to the group and, at the same time, we can learn more about aspects not immediate for us, give us the possibility to study the problem also from others points of view.

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