2. Fall 2007 http://www.cis.ksu.edu 1 CIS 764 Database Systems Engineering L6a: Usability - Part 1 (Part 2 … case studies) L6b. Review of Homeworks (next slides)

3. Fall 2007 http://www.cis.ksu.edu 2 CIS 764 Database Systems Engineering Status … about class demos  JDev in labs … reported to be fixed JDev wireless + off-campus …still pending (KSU firewall blocks Oracle port, why so slow to change that ??? ) JDev to develop DB tables: http://www.oracle.com/technology/products/jdev/index.html  Tutorials  Database development http://www.oracle.com/technology/obe/obe1013jdev/10131/ database%20development/obe_%20dbasedevmt.htm

4. Fall 2007 http://www.cis.ksu.edu 3 CIS 764 Database Systems Engineering Usability … a measure (a ranking or quantitative assessment) of user satisfaction and performance in using an interface (web, application UI, or service API) for an application or service.

5. Fall 2007 http://www.cis.ksu.edu 4 CIS 764 Database Systems Engineering includes: function (functionality)... the use-cases, appearance........... the "look and feel", ( readable, simple: 7+-2 ) operation........................ the required behavior of the user and the behavior of the application (speed … how fast users complete transactions, … how fast system completes operations, navigation, conceptual/visual model, intuitiveness )

6. Fall 2007 http://www.cis.ksu.edu 5 CIS 764 Database Systems Engineering metrics: measure user speed, Likert measures of factors ( ease, navigation, readabililty,...) with statistical analysis http://en.wikipedia.org/wiki/Likert_scale http://en.wikipedia.org/wiki/Likert_scale

7. Fall 2007 http://www.cis.ksu.edu 6 CIS 764 Database Systems Engineering Why important? 1. usability will dominate the success/rejection of the application. 2. presentation & usability team typically same effort as the model implementation !! est. 10% of design budget == usability often a different “kind” of person: less technical, more user oriented: eg background in psychology, graphic arts

8. Fall 2007 http://www.cis.ksu.edu 7 CIS 764 Database Systems Engineering Refs: Usability.gov... http://www.usability.gov/basics/http://www.usability.gov/basics/ Nielson Usabiltiy 101 http://www.useit.com/alertbox/20030825.html Nielson: Ten Heuristics http://www.useit.com/alertbox/20030825.html http://www.useit.com/papers/heuristic/heuristic_list.html more links http://www.usableweb.com/http://www.useit.com/papers/heuristic/heuristic_list.htmlhttp://www.usableweb.com/

9. Fall 2007 http://www.cis.ksu.edu 8 CIS 764 Database Systems Engineering User-centered design: usability integrated with the requirements and design steps. awareness of usability guidelines and patterns. awareness of interaction patterns: navigation, selection, draging, etc. user advocate on design team analysis of user domain: roles, conceptual models, specific tasks, user personas use of prototypes: often visual mock-up (Story boarding) or state-machine simulator together with user observation & analysis (Usability labs, video & timed)

10. Fall 2007 http://www.cis.ksu.edu 9 CIS 764 Database Systems Engineering consider your homework page: user view ( the instructor): what purpose? what usability features? producer view (you): what purpose? what usability features?

11. Fall 2007 http://www.cis.ksu.edu 10 CIS 764 Database Systems Engineering consider your homework page: user view ( the instructor): what purpose? an index to homework items, identification of items & author, by date what usability features? Firefox & IE (browser independence) loads fast … minimal images, etc minimal scroll (compact, not large font) student name + item names stable record … some examples follow = = = =>

12. Fall 2007 http://www.cis.ksu.edu 11 CIS 764 Database Systems Engineering.

13. Fall 2007 http://www.cis.ksu.edu 12 CIS 764 Database Systems Engineering

14. Fall 2007 http://www.cis.ksu.edu 13 CIS 764 Database Systems Engineering end.

15. Fall 2007 http://www.cis.ksu.edu 14 CIS 764 Database Systems Engineering end.

16. Fall 2007 http://www.cis.ksu.edu 15 CIS 764 Database Systems Engineering.

17. Fall 2007 http://www.cis.ksu.edu 16 CIS 764 Database Systems Engineering student goals: grades reported …. Name in URL or page permissions set security ……………. included an empty index.html prevents directory browsing to find homework items In public_html directory included a robots.txt file disallow crawling robots to index the homework directory

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19. Fall 2007 http://www.cis.ksu.edu 18 CIS 764 Database Systems Engineering ABDABD

20. Fall 2007 http://www.cis.ksu.edu 19 CIS 764 Database Systems Engineering end.