CIS 764 Database Systems Engineering

1. CIS 764 Database Systems Engineering L14: Usability - Part 2 : examples, About Presentations (beginning slides are copied from L6a) http://www.cis.ksu.edu

2. 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. “good”, “nice” are not measures ! “number of ..”, time, Likert scale… are measures. http://www.cis.ksu.edu

3. 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 http://www.cis.ksu.edu

4. CIS 764 Database Systems Engineering Why important? 1.  usability will dominate the success/rejection of the application. 2.  presentation & usability team  typically UI design = same effort as model implementation !!       10% of UI design  == usability http://www.cis.ksu.edu

5. CIS 764 Database Systems Engineering • Refs: • Usability.gov  ... http://www.usability.gov/basics/ • Nielson  Usabiltiy 101   http://www.useit.com/alertbox/20030825.html Nielson:  Ten Heuristics  • http://www.useit.com/papers/heuristic/heuristic_list.html more links  http://www.usableweb.com/ • books • old The Design of Everyday Things,(Norman) • 2001 Homepage Usability: 50 Websites Deconstructed (Nielsen) • 2000 Designing Web Usability: The Practice of Simplicity (Nielsen) • current … $$$ for usability reports http://www.cis.ksu.edu

6. CIS 764 Database Systems Engineering Your usability evaluations: seeking e-commerce-like sites (user interaction to a back-end DB) seeking some bad site, some good site. (many found both bad and good at same site) http://www.cis.ksu.edu

7. CIS 764 Database Systems Engineering Amazon, Yahoo, Monster Orkut (2), Digg.com Google, Yahoo Gmail, KSU webmail NY Times, Manhattan Mercury, KSU Collegean CIS540 HP(3), Dell (2), Sony, IBM(2), BEA, Microsoft, CircuitCity Verizon espnStar ING Stonybrook U from India: rediff, indicthreads, naukri KeyPoster, LongCycle, Durlston, ocgov deal2buy, slickDeal, JustDeals whattheboat, latex-project dzinerHolidays Chilpotle http://www.cis.ksu.edu

8. CIS 764 Database Systems Engineering Good features: layout .. simple fast (simple) easy rich personal http://www.cis.ksu.edu

9. CIS 764 Database Systems Engineering Good features: “good” organization / layout (5); standard layout (bbb); organization by user roles; Nielson’s features fast (2): no ads easy navigation: rich functions, drop down selection, good search (spelling); tutorials; rich functions: dynamic update ( usually Ajax) data mining … customer helps personal profile data mining … customer helps multi-language … select non-english auto-region detect … http://www.cis.ksu.edu

10. CIS 764 Database Systems Engineering Bad features: (layout) complex layout (4); complex lists of items; color clash, icon visibility (fast) big ads, blinking, clutter, many ads, useless flash (easy) long navigation, numeric user id, multiple register (rich) hides the cost (2), no product reviews missing feature (fwd email) weak search; no search feature (bad) bad links not cross-browser incomplete drop down list security breach not Nielson features http://www.cis.ksu.edu

11. CIS 764 Database Systems Engineering Class web evaluation pages: ... No name (many) … non-active links (text, but no link) … several … no images ! …. few vs too large images … many vs bad link to image … few … did not answer the question: “what good / bad feature” … few … spelling errors … several http://www.cis.ksu.edu

12. CIS 764 Database Systems Engineering • Nielson 2000, Top ten mistakes: • Bad search • Pdf files • Color of visited links • Non-scannable text • Fixed size fonts • Weak page titles • Ads • Violating design patterns • Opening new windows • Not answering key questions (like price) • http://www.useit.com/alertbox/ http://www.cis.ksu.edu

13. CIS 764 Database Systems Engineering Bad features: How can this be? What is the answer? Is the state of software quality any different from the state usability? Ans: http://www.cis.ksu.edu

14. CIS 764 Database Systems Engineering Bad features: How can this be? * GUI design by programmers. * Test / evaluation by the designers. good for the business =/= good for user natural difference in preferences What is the answer? http://www.cis.ksu.edu

15. CIS 764 Database Systems Engineering Bad features: How can this be? * GUI design by programmers. * Test / evaluation by the designers. What is the answer? follow established standards * (Nielson) visual prototypes [if necessary, mock back-end data] * user personas (and real users) * patterns (of domains & interactions) * usability testing labs http://www.cis.ksu.edu

16. CIS 764 Database Systems Engineering • Doc Searls : • used to sell many books • his site linked to Amazon for fulfillment. • changed site to link to Wordsworth for fulfillment • …. • sold zero single books !! • Why? http://www.cis.ksu.edu

17. CIS 764 Database Systems Engineering • Doc Searls : • used to sell many books • his site linked to Amazon for fulfillment. • changed site to link to Wordsworth for fulfillment • …. • sold zero single books !! • Why? • users do not want to learn any new interface • Wordsworth violated guidelines for ecommerce: • - bag vs cart • - “add to bag” gives no feedback • - cannot find the “checkout” link • (all these have been changed) http://www.cis.ksu.edu

18. CIS 764 Database Systems Engineering Response times: 0.1 sec .. Interaction OK, no other feedback 1.0 sec .. Not direct interaction, but no other feedback 10 sec .. OK wait time with feedback longer … user will multi-task to other windows. http://www.cis.ksu.edu

19. CIS 764 Database Systems Engineering GNOME Usability Guide  http://developer.gnome.org/projects/gup/hig/2.0/       (could you find it from   http://developer.gnome.org/                                         or http://developer.gnome.org/projects/gup/ http://www.cis.ksu.edu

20. CIS 764 Database Systems Engineering Usability Testing    Wichita State Software Usability Research Laboratory http://psychology.wichita.edu/surl/ example studies:   10 mistakes of shopping carts:  http://psychology.wichita.edu/surl/usabilitynews/42/shoppingcart.htm        about fonts   http://psychology.wichita.edu/surl/usabilitynews/3S/font.htm        3 auto insurance sites  http://psychology.wichita.edu/surl/usabilitynews/42/insurance.htm        image speed / compression  http://psychology.wichita.edu/surl/usabilitynews/3S/download_time.htm http://www.cis.ksu.edu

21. CIS 764 Database Systems Engineering http://www.zenhaiku.com/archives/usability_applied_to_life.html 1 prevent errors: put items out the night before 2 consistency & standards: always put keys in right pocket 3 prevent errors: auto schedule key bills … http://www.cis.ksu.edu

22. CIS 764 Database Systems Engineering About the class presentations: Why? http://www.cis.ksu.edu

23. CIS 764 Database Systems Engineering About the class presentations: Why? Dimensions of “knowledge” technical / concrete … coding constructive / abstract … design concept /abstract …. speaking / teaching language …. writing relational …. group work … many more http://www.cis.ksu.edu

24. CIS 764 Database Systems Engineering About the class presentations: Presentation Evaluation Form: Name: ________________________________ Date:_______________ Topic:__________________________ ___________________________ Start: __________ Stop:___________ Time:____________________ Eye contact: Font Size: Position: Colors: Volume: References: Confidence: 7+-2 UM’s, “you know”: Diagrams: other: Concept: negatives: Example: Difficulty: Response to questions: Technical content: 1 2 3 4 5 6 7 8 9 10 Presentation style: 1 2 3 4 5 6 7 8 9 10 Notes: http://www.cis.ksu.edu

25. CIS 764 Database Systems Engineering Speaking: Eye contact … make regular eye contact Position … face the audience, not the screen Volume … strong, but check that audio clips not overdriven Confidence … be in control, sound sure UM’s, “u-kn” … 1-10 is OK , 35-70 is  don’t rush – take time between each sentence, slide negatives …. Profession presentation; No – apologies, bad/slang words, negatives (“I’m don’t quite understand this, but …”) other … don’t read slides (particularly lists of items ) time … 8-14 minutes (look for moderator waving the watch) questions … allow a time for questions http://www.cis.ksu.edu

26. CIS 764 Database Systems Engineering Slides: Name and title Font Size … not too small Colors ……. contrasting colors Density …. not long text; use bullets, key words 7 + - 2 … few points per slide; except of lists of example items Diagrams … very helpful Concept & example … need both References … included Questions … allow a point for questions Difficulty … don’t re-do the basic concepts of 764 ; do contribute “new” information. http://www.cis.ksu.edu

27. CIS 764 Database Systems Engineering * send slides in advance or have them loaded on your machine * record audio clips (sometime .. before, during, after the talk) (submit final slides with audio for posting) * post on your homework page: ~ 2 page summary / overview of your slides: w. name, title, main definition, your purpose, references [ Why … evaluation of writing proficiency.] http://www.cis.ksu.edu

28. CIS 764 Database Systems Engineering Final evaluation questions (at the end of the semester): First, provide a collection of 2 sentence reviews of each (most) talks: (a) what is the subject (brief statement/definition) (b) what did the presenter say / present about the subject e.g. Intro, overview, example, critique, relation to other topic, …? More about this at the end. http://www.cis.ksu.edu

29. CIS 764 Database Systems Engineering end. http://www.cis.ksu.edu