The document discusses the implications of everyday tasks for ubiquitous computing applications. It proposes that everyday tasks are conceptually simple and aim to minimize effort. This makes them well-suited for ubiquitous computing support. The paper then presents a case study called "easymeeting" that uses NFC technology in a prototype application to simply manage meeting room needs like refilling coffee. An evaluation of the prototype found it was seen as useful and participants were generally capable of using it despite little knowledge of the underlying NFC technology, showing the design criteria enabled simplicity. However, more structured evaluation of design principles is still needed to better understand their correlation and improve convenience.

8. Case Study – bluespot MAP Picture copyright © Wall AG 2008

10. Research Setup Learnings from several smaller case studies Mapping of hypotheses on large case studies -> Evaluation according learnings - Pilot studies Mobile Prosumer RMV Retail ÖPNV Integrated Ubicomp System Public Space Case 1 Case 2 Case 3 Case 4 Case 5… easymeeting

13. Example: Decision Trees as Starting Point (Ice cream) (Norman 1999) a1 a2 a3 a4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 b Shallow decision tree Narrow decision tree First decision Further choices 1 2 a exit exit exit exit exit

18. Combined to Ubicomp Design – Criteria Sets

21. Prototype and location in meeting room (Organization 1)

22. The paper prototype

23. Example: Refill coffee Touch & receive Coffee

26. IT architecture overview Nokia 6131 NFC Discover tag Perform action according stored ID SMS2EMail Gateway Convert incoming SMS to email and forward to predefined adress Microsoft Exchange Server Receive e-Mail on Server and process rule E-Mail Client Webbrowser Receive e-Mail or SMS on local client and webbrowser (ticketing) Initiate real world process User interaction Technical process User interaction Mobile phone

27. Evaluation *(Venkatesh 2004) n=37 with n1=22 (O1) and n2=15 (O2) Sample number Random Sample type Two organizations with 25 employees (O1) up to 300 employees (O2) Universe Quantitative: Interval 5-item-scale (Mostly UTAUT* Items) Qualitative: Questionnaire survey Measuring method December 19 th 2006 to February 6 th 2007 Period Personal interview with questionnaire Method of data collection Quantitative/qualitative survey Research framework

29. Evaluation

33. Every great advance in science has issued from a new audacity of imagination . John Dewey Contact Florian Resatsch [email_address]