If the users can t use it, it doesn t work

Transcription

1 TestCon 2018 If the users can t use it, it doesn t work Rolf Molich DialogDesign Denmark Vejle Station, DK, track 6, Saturday morning Slides Copyright 2018 Rolf Molich, page 1

2 V d d t t t d d Slides Copyright 2018 Rolf Molich, page 2

3 The passenger explained that because of the bright, red ring he was totally convinced that this was the emergency brake. He explained that in a situation like this you don t read text, you act. He did not notice the real emergency brake handle. After the incident, the emergency brake handle was pointed out to him. Slides Copyright 2018 Rolf Molich, page 3

4 Are the train s systems working according to specifications? Yes! Is there a problem? Yes! This is a usability problem Rolf Molich, DialogDesign Independent usability consultant, DialogDesign, Denmark. Since 1993 Education: MSc in Software Engineering, 1974 Invented the heuristic evaluation method in 1990 with Jakob Nielsen Comparative Usability Evaluation (CUE) studies UXPA-I Lifetime Achievement Award 2014 for the CUE-studies Passionate about UX certification: Slides Copyright 2018 Rolf Molich, page 4

5 cabbage > Sorry, the password must be more than 8 characters. boiledcabbage > Sorry, the password must contain 1 numerical character. 1 boiled cabbage > Sorry, the password cannot have blank spaces. 50frackingboiledcabbages > Sorry, the password must contain at least one upper case character. 50FRACKINGboiledcabbages > Sorry, the password cannot use more than one upper case character consecutively. 50FrackingBoiledCabbagesShovedUpYourArse.IfYouDon tgivemeaccessimmediately > Sorry, the password cannot contain punctuation. NowIAmGettingReallyPissedOff50FrackingBoiledCabbagesShovedUpYourArse IfYouDontGiveMeAccessImmediately >Sorry, that password is already in use. Slides Copyright 2018 Rolf Molich, page 5

6 Credo 1 If the users can t use it, it doesn t work -- Susan Dray I want a carousel on the home page 12 Slides Copyright 2018 Rolf Molich, page 6

7 HiPPO = Highest Paid Person s Opinion Credo 2 Data is important Opinions are unimportant Slides Copyright 2018 Rolf Molich, page 7

8 Users: Pests with requests. -- Anonymous Users: Those things that make it possible for us to pay you. -- Matthew Oliphant Slides Copyright 2018 Rolf Molich, page 8

9 Usability The extent to which an interactive system can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specified context of use. Or, perhaps slightly simpler: Can the product do what *I* want? Can it do what I want, fast? Is the product pleasant to use? An alternative definition of usability Slides Copyright 2018 Rolf Molich, page 9

10 Quiz Judging from the home page of Arngren.net, is this website usable? A. Yes, it is usable B. It depends... C. There is insufficient information to answer the question D. No, it is not usable Slides Copyright 2018 Rolf Molich, page 10

11 Usability test A usability evaluation that involves representative users performing specific tasks with the interactive system to enable identification and analysis of usability problems, or the measurement of effectiveness, efficiency, and user satisfaction. A usability test consists of a number of usability test sessions. In each session, a usability test participant attempts to carry out representative usability test tasks using the interactive system or a prototype of the interactive system. Slides Copyright 2018 Rolf Molich, page 11

12 Usability test: The think-aloud method Usability test: The think-aloud method Slides Copyright 2018 Rolf Molich, page 12

13 The core of a usability test In a usability test, test participants solve realistic tasks with as little help from the moderator as possible. We are not showing test participants how to solve tasks. We are not interested in test participants opinions. We want to know whether they can solve the tasks we give them. Slides Copyright 2018 Rolf Molich, page 13

14 Sample usability test tasks for Ryanair s website Book a one-way flight with Ryanair from London to Copenhagen on May 1. Find out how much cabin baggage you can bring on the flight from London to Copenhagen You can t fly on May 1 after all. Change the date of the booking to May 3. Quiz Which one of the following is a valid usability test task for Ryanair s website for travellers? A. Look around on Ryanair s website. Is it easy to use? B. Is Ryanair s price for a return flight from London to Madrid on July 9 reasonable? C. Find out how long before departure you have to be at the gate. D. Find Ryanair s most recent press release. Slides Copyright 2018 Rolf Molich, page 14

15 Usability test: The think-aloud method PREPARE FOR THE USABILITY TEST Write a usability test plan Write the usability test script > Include usability test tasks Recruit test participants CONDUCT THE USABILITY TEST SESSIONS Briefing: We are not testing you! Pre-session interview Solve usability test tasks Post-session interview REPORT THE RESULTS Write the usability test report Communicate the usability findings Usability test of a prototype Slides Copyright 2018 Rolf Molich, page 15

16 Paper Prototyping Training Video by Nielsen Norman Group, The human-centred software development cycle PLAN THE HUMAN- CENTERED DESIGN PROCESS ANALYSIS: UNDERSTAND AND SPECIFY THE CONTEXT OF USE USABILITY TEST THE DESIGNS AGAINST USER REQUIREMENTS SPECIFY THE USER REQUIREMENTS PRODUCE DESIGN SOLUTIONS TO MEET USER REQUIREMENTS DESIGN SOLUTION MEETS USER REQUIREMENTS Slides Copyright 2018 Rolf Molich, page 16

17 If you want to know more... CPUX-F curriculum: Usability explained in 60 pages Certification and free quiz questions that allow you to check your understanding are available Available at no cost from UXQB: uxqb.org/en/documents/ CPUX-UT curriculum: Usability testing explained in 60 pages Certification and free quiz questions that allow you to check your understanding are available Available at no cost from UXQB: uxqb.org/en/documents/ CTFL Usability Tester curriculum: Usability testing explained in 60 pages Certification and free quiz questions that allow you to check your understanding are available Available at no cost from GTB/ISTQB: Steve Krug: Rocket surgery made easy (book) Carol Barnum: Usability testing essentials (book) Summary Usability: Can the product do what *I* want? Can it do what I want fast? Is the product pleasant to use? Discussions about usability should be based on real user data, not opinions You can get real user data from usability tests In a usability test, representative users solve representative tasks while they are being observed by a neutral moderator Usability test Prepare the usability test Conduct usability test sessions Report the results Voting system: Shakespeak.com Slides Copyright 2018 Rolf Molich, page 17