Usability and Industrial Design for a user-centred programmable by wku77463

VIEWS: 11 PAGES: 3

									                                                                                   Who are User Vision?
                                                                                     Edinburgh-based Usability Consultancy
                                                                                     Usability Services to Products, Web sites and
                                                                                     Software
   Usability and Industrial Design for a                                                Consultancy
               user-centred                                                             Audits / evaluations
      programmable thermostat                                                           Training
                                                                                        Usability Testing
                                                                                     Clients include: Dell, DTI, Intelligent Finance, BBC, Scottish
                                  Presented by:
                                                                                     Enterprise, Royal Bank of Scotland, HSBC, Leeds City Council,
                                   Chris Rourke                                      Honeywell
                                 3rd November, 2005
                     Scottish Usability Professional’s Association




Outline                                                                            Honeywell’s business requirement
 The usability & business challenge                                                  New programmable thermostat design
 Usability & Industrial Design Activities
 Results




                                                                                     Usability & appearance of thermostat important for
                                                                                        End user – Styling important
                                                                                        Installers (part of value chain)
                                                                                     Desire to capture lessons from existing design
                                                                                     Support multi-lingual market in Europe




Our approach                                                                      Models in initial comparative test
                        Initial Comparative Tests




  Develop Interaction Design                          Develop Industrial Design


                                                                                   Honeywell CM20                               Touchscreen
       Iterative Tests – UK &
                                                      Development
            International



                              Finalise Design for
                                  Production
                                                                                   Soft Keys prototype
                                                                                                                               Theben




                                                                                                                                                      1
 Initial testing                                                                                                                                              Initial Round – Comparative testing
                         Goal: identify features to incorporate
                                Design & position of buttons and other controls
                                Clarity of terminology and iconography
                                Screen layout of information e.g. temperature, time, date.
                                Interactions & visual cues e.g. screen feedback, icons
                         Subjects: 7 Installers, 7 Domestic users
                         Each test one-on-one, lasting 2 hours in total
                                Pre task interview
                                Testing pre-agreed tasks on all 4 – reviewing & changing factory
                                setting, copying settings for a day, manual setting, changing time
                                Post task interview & questionnaire
                         Test metrics captured
                                Success rate
                                Perceived difficulty
                                Use of instructions (an option)
                                Qualitative comments, types of errors
                                All tests video recorded




 Results                                                                                                                                                      Key findings & questions
Lots of data captured, analysed in Honeywell 6-Sigma Quality Control.
                                                                                                                                                               Confirmation button added confidence, feedback
Presented graphically for quantitative tasks                                                                                                                   Need to distinguish current & target temperature
                                                             Domestic Users - Average Success Rate Per Task
                                                                                                                                                               Clear labelling of the functions on casing / screen
                          100        T ask 1               T ask 2               T as k 3           T a sk 4            T a sk 5               T a sk 6
                                                                                                                                                               Allowing easy movement between viewing and
                           90
                           80
                                                                                                                                                               editing the settings of a programme
  Average Success Rate




                           70
                                                                                                                                                               Key questions
                           60

                           50                                                                                                                                    How move between different time intervals?
                           40                                                                                                                                    How much info to fit on LCD screen – line of text?
                           30

                           20
                                                                                                                                                                 What makes an attractive industrial design
                           10
                            0
                                 A    B        C   D   A     B       C   D   A    B     C   D   A    B    C     D   A     B        C   D   A   B     C    D

                                                                                 For Thermostat A, B, C, or D




 Industrial design goals and constraints                                                                                                                      Development & round two tests
                         Retain footprint and architecture of CM20                                                                                             Software prototype for exploring interactions &
                         Minimum possible depth from wall                                                                                                      display options including confirmation button
                         Two versions (basic & advanced) sharing same parts                                                                                    Extensive internal and external reviews to refine
                         Improve user interface experience                                                                                                     Prototype tested with target users
                                                                                                                                                                 Industrial design drawings, models provided
                         Develop contemporary brand identity
                                                                                                                                                                 First in UK, iterative refinements, then Spain & Belgium
                         Build on ‘wave’ of previous designs (if appropriate)
                                                                                                                                                                 Similar metrics as previous test, but qualitative discussion,
                                                                                                                                                                 ratings & rankings to explore the design issues
                         Multiple design concepts were generated
                         2D sketches, 3D sketch models & 3D CAD
                         5 concepts proposed, 3 taken to user trials
                         3 concepts each chosen from Shore and Italian firm




                                                                                                                                                                                                                                 2
                               Questions addressed in testing                                                                                                             Round two tests – UK, Spain & Belgium

                                                                      Time and temperature
                                                                      adjustments well placed?


            Functions for
            copying settings
            between days

                                                                                                                                                           Was line of
                                                                                                                                                           text helpful
            Slider position,
            order of settings
                                                                                                                                                           Icon design


                                                                                                                                                          Would OK be
                                                                                                                                                          noticed, used

Different way to navigate time periods
•Arrow keys < >
•Separate buttons OOOOOO




                               Design Review interface elements                                                                                                           Findings
                                                                                                                                                                           Significant improvements on task success rate and
                                                      Combined - Average ratings for design elements
                          3 .00



                                                                                                                                                 Features were             satisfaction from initial tests
                          2 .00
                                                                                                                                                 rated                     Clear evidence of where some changes still had to
                                                                                                                                                 individually for          be made
                          1.00
                                                                                                                                                 each design
                                                                                                                                                                           Clear basis of data to refine & reposition design
                          0 .00                                                                                                                                            elements
                                         1                  2                3                    4               5                 6
                                                                             D e s ign C o nce pt s

                    Size of buttons           Shape of buttons    Look of the flap/lid used           Position of buttons   Position of slider

                                             Combined - Elements from concepts A, B, C, D, E or F for ideal design                               Subjects asked
                          15
                                                                                                                                                 to create their
 Number of participants




                                                                                                                                                 ‘ideal design’
                                                                                                                                                 from parts of
                          10




                          5
                                                                                                                                                 each
                          0
                                     1                  2                3                       4                5                 6
                                                                         Design Concepts

                          Front with flap open          Front with flap closed          Shape of LCD Display          Button shapes
                          Size of buttons               Layout of buttons               Position of slider




                               The end result                                                                                                                             Contact for any questions
                                                                                                                                                                           Chris Rourke
                                                                                                                                                                           chris@uservision.co.uk
                                                                                                                                                                           0131 225 0850
                                                                                                                                                                           www.uservision.co.uk




                                  2 different concepts manufactured to target alternate
                                  sales channels (both from Shore Design)
                                  Optimum integration of button/screen layout, styling
                                  and modular flexibility




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