Com paring W eb Applications w ith Desktop Applications: An Em - - PowerPoint PPT Presentation

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Oct 20, 2022 386 likes •520 views

Com paring W eb Applications w ith Desktop Applications: An Em pirical Study Paul Pop paupo@ida.liu.se Department of Computer and Information Science Linkping University Sweden 1 of 13 May 26, 20 0 0 Motivation and Objective Draw

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1 of 13 May 26, 20 0 0

Com paring W eb Applications w ith Desktop Applications: An Em pirical Study

Paul Pop

paupo@ida.liu.se Department of Computer and Information Science Linköping University Sweden

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 2 of 13 May 26, 20 0 0

Motivation and Objective

Draw backs of desktop applications: development done on multiple platforms, have to downloaded before their use, administration and maintenance. W eb applications: thousands implemented in recent years, used by millions of users. Usability of w eb applications com pared w ith desktop applications.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 3 of 13 May 26, 20 0 0

Definitions

Desktop application: WIMP, direct manipulation. W eb application: runs on a server and presents itself through a web browser. Examples: web based email, bookmark managers, personal information managers, web calendars, online banking.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 4 of 13 May 26, 20 0 0

Calendaring Application

Our specifications for an application: cost and size. Calendaring applications:

verview of a day, week, year;

add, delete and move events; find free slots and events; reminders, meeting planners, sharing, “to do” lists.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 5 of 13 May 26, 20 0 0

Microsoft Calendar

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 6 of 13 May 26, 20 0 0

Yahoo!Calendar

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 7 of 13 May 26, 20 0 0

Study Setup: Tasks

Training tasks.
Tasks:

Go To From today, go to July 17. Add Add “Buy tickets” from 2pm, for 30 min. Move Move two consecutive events 1 hour. Undo Undo the previous move task.

Time per task in seconds, errors.
Small pilot study.
Record and Playback: ScreenCorder.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 8 of 13 May 26, 20 0 0

Study Setup, Continued

Six subjects: five male and one female. On average 48 minutes with the study. Allowed to abort tasks. Questionnaire: age from 25 to 27 years, median of 26.3 years, more than 5 years experience with computers, used computers more than 20 hours per week, three used the web applications,

ne used calendaring applications before.

Lim itations: subjects, statistical analysis.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 9 of 13 May 26, 20 0 0

Average Tim e per Task

10 20 30 40 50 60 70 80 90 100 Go To Add Move Undo Desktop Web

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 10 of 13 May 26, 20 0 0

Error Rates

Go To Add Move Undo MC YC MC YC MC YC MC YC OK 6 6 6 6 5 5 6 3 Error 1 1 2 Abort 1

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 11 of 13 May 26, 20 0 0

Usability Problem s

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 12 of 13 May 26, 20 0 0

Discussion

Hypothesis (confirmed): the performance of users will be significantly reduced. 3 factors: limited interaction mechanisms provided by web browsers, mismatch: user’s mental model and the application, delays from downloading the web pages.

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Com paring Web Applications with Desktop Applications: An Em pirical Study Paul Pop 13 of 13 May 26, 20 0 0

Conclusions and Future W ork

Users are tw ice as slow when using web applications: interaction mechanisms provided by the web browsers, lack of delimitation between browsers and web applications. Future work: predicting the performance degradation, guidelines for web applications, m apping existing desktop applications to web.