pucd

Information about pucd

Published on April 21, 2008

Author: Carolina

Source: authorstream.com

Content

Principles of User-Centered Design:  Principles of User-Centered Design CSCI 4800/6800 Feb. 1, 2006 What is design? :  What is design? Finding the right 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 Engineering design: “the use of scientific principles, technical information and imagination in the definiton of a mechanical structure, machine or system to perform pre-specified functions with the maximum efficiency and economy. Approaches :  Approaches Formal specifications Custom crafted / creative User-Centered Design:  User-Centered Design Principles Make user issues central in the design process Carry out early testing and evaluation with users Design iteratively Methods for UCD:  Methods for UCD Soft Systems Methodology (SSM) Open Systems Task Analysis (OSTA) Multiview Star Life Cycle Soft Systems Methodology:  Soft Systems Methodology Focuses on planning Approach developed by Checkland, Schloes ’81, ’91 Emphasis : understand the problem and its situation SSM:  SSM Stages in SSM:  Stages in SSM Stages 1 and 2 – obtain “rich expression” of the problem: meetings with stakeholders Stage 3 – obtain precise definition of the system Stage 4 – produce conceptual models: abstract representation, “root definition” SSM, “root definition”:  SSM, “root definition” C - Clients (people who will benefit/suffer) A - Actors (who is involved with system) T - Transformation (purpose) W - Weltanschauung/World View (perspective from which root definition is formulated) O - Owners (who has commissioned system) E - Environment SSM:  SSM Stage 5 – compare “root definition” of stage 4 with “rich expression” of stage 2; iterate until gaps are filled Stage 6 – identify changes Stage 7 – recommend an action SSM:  SSM Benefits for HCI engineering: Identifies people, constraints, view of system Develops conceptual models Cooperative Design:  Cooperative Design Participative design – users participate in design process Sociotechnical design – considers both social and technical alternatives/solutions to/ aspects of problems OSTA – Open Systems Task Analysis (Eason, Harker ’89) OSTA:  OSTA OSTA:  OSTA Specified together: Technical requirements System structure, functionality Social system requirements Usability, acceptability Goal: Provide method for understanding what occurs when computer system is introduced into a working environment OSTA – Systems Analysis (top):  OSTA – Systems Analysis (top) Primary task stated (goals of group of workers identified) Task inputs identified - usually come from outside the system - character of inputs may vary & affect way system behaves External environment - including physical environment, economic, political conditions, demand for task output Transformation processes described typically - object/action flowchart of objects to be transformed & actions neccessary to transform them with annotations OSTA – technical and social:  OSTA – technical and social 5. Social system analyzed Roles of people in relation to one another Characteristics & qualities of users of new system Technical system analyzed - how will new system be integrated with others systems & what remains of the old system? Performance satisfaction – for social system under new technical systems Requirements for new technical system, based on the task analysis Functionality, usability, acceptability Problems::  Problems: Need expert to guide the design process Ability to integrate with other design processes/methods Need “right” organizational and political climate Cost-effective??? Multiview:  Multiview Combines sociotechnical and soft-systems approaches Stage 1: create PTM (primary task model) – similar to “root def” Stage 2: conceptual modeling of info flows/ structure, produce FM (functional model), ER model, dataflow models Stage 3: design people tasks (PT), role sets (RS), and computer task requirements (CTR) Stage 4: design the HCI Stage 5: technical design Multiview:  Multiview Multiview:  Multiview Provides more direction for system designers Star Life Cycle:  Star Life Cycle No prescribed ordering of activities Based on actual design practive of HCI designers Emphasis on prototyping and evaluation Rapid prototyping, incremental development The Star Life Cycle:  The Star Life Cycle Star Life Cycle:  Star Life Cycle Conceptual design – what is required? What should system do? What data is required? What will users need to know? Physical design (formal design) : how to achieve the conceptual design … Methods for UCD:  Methods for UCD Example: Olympic Messaging Service (1984 Los Angeles Olympic Games) :  Example: Olympic Messaging Service (1984 Los Angeles Olympic Games) Kiosks at which athletes could send & receive voice messages among themselves Or people from around the world could send messages in to athletes & official Twelve languages (no translation) OMS - Process:  OMS - Process Paper scenarios of user interface prepared Comments from designers, management, prospective users Some functions altered, others dropped Brief user guides prepared, tested, developed iteratively (~200 iteratives) Simulations constructed & evaluated; help messages designed Simulations tested with users OMS - Process:  OMS - Process Needed to add undo/backup button Visit to village site, demos & interviews with ex-olympians & others involved Prototype developed & tested "Hallway" method to collect info on height & layout of prototype kiosk "Try-to-destroy-it" tests of robustness (CS students) OMS – summary :  OMS – summary Focus on users & tasks early in design process, including user guides, help, & ensuring that user's cognitive, social, & attitudinal characteristics are understood & accomodated Measure reactions by using prototype manuals, interface, & other simulations of the system Design iteratively All usability factors must evolve together and be under the responsibility of one control group Example: Air Traffic Control System:  Example: Air Traffic Control System Original system Variety of info needed, each from own source - some on desk, some on ceiling, some not in line of sight Dials Closed Circuit TV Temporary instructions Air Traffic Control:  Air Traffic Control Desire: Integrated data display system SAFETY (major concern) "Upgradeable" Variety of airports/local requirements Modified info requirements Layouts specific to controller & task More color Ability to add pages for specific local conditions Simple editing facilities for updates Example – Air Traffic Control System:  Example – Air Traffic Control System Process: Evaluate controller’s task Develop first-cut design Establish user-systems design group Concept testing, user feedback Produce upgraded prototype Road-show to five airports Develop systems specification build and install system establish new needs

Related presentations


Other presentations created by Carolina

difficult
15. 01. 2008
0 views

difficult

usss2002 cubesat
08. 01. 2008
0 views

usss2002 cubesat

Healthcare Disparities
10. 01. 2008
0 views

Healthcare Disparities

Psy101 10
10. 01. 2008
0 views

Psy101 10

Vaginitis
10. 01. 2008
0 views

Vaginitis

pac presentation1
11. 01. 2008
0 views

pac presentation1

Gina
13. 01. 2008
0 views

Gina

Optical Illusions kiyoon
14. 01. 2008
0 views

Optical Illusions kiyoon

umb in a nutshell
14. 01. 2008
0 views

umb in a nutshell

Shark
15. 01. 2008
0 views

Shark

Christmas assembly
17. 01. 2008
0 views

Christmas assembly

Investigation of Brassica Rapa
20. 01. 2008
0 views

Investigation of Brassica Rapa

Americom
22. 01. 2008
0 views

Americom

weathering soils
22. 01. 2008
0 views

weathering soils

07Feb27 xingakui
04. 02. 2008
0 views

07Feb27 xingakui

C91239DF96
05. 02. 2008
0 views

C91239DF96

ide106 bike2
05. 02. 2008
0 views

ide106 bike2

Okeke
24. 01. 2008
0 views

Okeke

concepts
18. 01. 2008
0 views

concepts

Value Retailers sec2
29. 01. 2008
0 views

Value Retailers sec2

Healton
30. 01. 2008
0 views

Healton

cancun betty salinas
31. 01. 2008
0 views

cancun betty salinas

SmartJitney
04. 02. 2008
0 views

SmartJitney

nkf 2006
07. 02. 2008
0 views

nkf 2006

prestige novation
07. 02. 2008
0 views

prestige novation

Mars 1
28. 01. 2008
0 views

Mars 1

SCD
29. 02. 2008
0 views

SCD

LNGPresentationEnS
08. 03. 2008
0 views

LNGPresentationEnS

brown
14. 03. 2008
0 views

brown

13 04 05
19. 03. 2008
0 views

13 04 05

secchi reconstruction 062004
24. 03. 2008
0 views

secchi reconstruction 062004

Jeopardy Test Taking
13. 01. 2008
0 views

Jeopardy Test Taking

F 1Update College Station
31. 03. 2008
0 views

F 1Update College Station

4th yr HIV PEP 2007
27. 03. 2008
0 views

4th yr HIV PEP 2007

2006 project presentation final
28. 03. 2008
0 views

2006 project presentation final

Design Theory
04. 02. 2008
0 views

Design Theory

Explosive Power in Sport for SPC
16. 04. 2008
0 views

Explosive Power in Sport for SPC

PHED190history
17. 04. 2008
0 views

PHED190history

creativeCities
22. 04. 2008
0 views

creativeCities

RURALCONFERENCE2006
24. 04. 2008
0 views

RURALCONFERENCE2006

ERCA2 Stratosphere
21. 02. 2008
0 views

ERCA2 Stratosphere

SPS enquiry point 1
08. 05. 2008
0 views

SPS enquiry point 1

BEACH VOLLEYBALL Powerpoint
30. 04. 2008
0 views

BEACH VOLLEYBALL Powerpoint

SportScout Sfingos Santorini
02. 05. 2008
0 views

SportScout Sfingos Santorini

Time space disjuncture
02. 05. 2008
0 views

Time space disjuncture

Anth104
10. 03. 2008
0 views

Anth104

newrepublicanpartybi rth
15. 02. 2008
0 views

newrepublicanpartybi rth

ucfihco
13. 02. 2008
0 views

ucfihco

funding public
05. 03. 2008
0 views

funding public

paa 2006 poster
17. 01. 2008
0 views

paa 2006 poster

nass briefing
16. 01. 2008
0 views

nass briefing

romeoandjuliet
07. 02. 2008
0 views

romeoandjuliet

2004927172848214
12. 02. 2008
0 views

2004927172848214

TripCom presentation april06
09. 01. 2008
0 views

TripCom presentation april06

pps 320
14. 02. 2008
0 views

pps 320

qual 11
21. 03. 2008
0 views

qual 11

ColinNingboDrama
17. 01. 2008
0 views

ColinNingboDrama

LexicalSemanticsIII
12. 03. 2008
0 views

LexicalSemanticsIII

Prof Tony McMichael
15. 03. 2008
0 views

Prof Tony McMichael

Short Course March 5
20. 02. 2008
0 views

Short Course March 5

MATRICSTRATEGY2007
28. 02. 2008
0 views

MATRICSTRATEGY2007

SUPV RECRUIT HNDBK
16. 01. 2008
0 views

SUPV RECRUIT HNDBK