1 / 20

Methods for Measuring Usability

Methods for Measuring Usability. Marianne Jahn Department of Geoinformation Technical University of Vienna. Plan. User and User groups User requirements Ontology of Navigation Problem Ontology Usability Toolboxes. Who are the Users?.

howe
Download Presentation

Methods for Measuring Usability

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Methods for Measuring Usability Marianne Jahn Department of GeoinformationTechnical University of Vienna Marianne Jahn TU-Vienna

  2. Plan • User and User groups • User requirements • Ontology of Navigation • Problem Ontology • Usability • Toolboxes Marianne Jahn TU-Vienna

  3. Who are the Users? A user is a person who makes use of a thing; someone who uses or employs something (Wordnet) User Characteristics: • Psychological characteristics (e.g. attitude, motivation) • Knowledge and experience (e. g. task experience) • Job and task charakteristics (e.g. frequency of use) • Physical characteristics (e. g. color blindness) Marianne Jahn TU-Vienna

  4. Identification of Users Five main steps to identify user and their needs using a certain system: • Background - direct observations or discussions • Goal of this definition - collection all available information about users to “Make up the body of user intelligence” (Chandler and Hyatt 2003) ·        Observe and listen to users ·        Review market segmentation and user profiling ·        Analyse current user behaviour and customer objectives ·        Define user interface requirements ·        Formulate value proposition and user needs Marianne Jahn TU-Vienna

  5. User Groups Marianne Jahn TU-Vienna

  6. Ontology of Navigation Object Ontology Data User Requirements User Groups Problem Ontology Marianne Jahn TU-Vienna

  7. Problem Ontology User requirements Dataquality Usability Ontology Marianne Jahn TU-Vienna

  8. Usability 1/2 Usability can be explained as “user friendliness”. The user is satisfied and his requirements are met. The conclusion for the user is to accept the system but ignoring the functionality behind. The system can be an application, a database, or only a single set of data. The main goal of a system is to reach acceptance from the user. Marianne Jahn TU-Vienna

  9. Usability 2/2 USABILITY Usability is the capability of the software product to be understood, learned, used and attractive to the user when used under specified conditions. Marianne Jahn TU-Vienna

  10. System Usability 1/2 System usability comprises the extent to which a product can be used by specified users to achieve specified goals with effectiveness, efficiency and satisfaction in a specifid context of use where: Marianne Jahn TU-Vienna

  11. System Usability 2/2 • Effectiveness measures the accuracy and completeness with which users achieve specified goals; • Efficiency measures the resources expended in relation to the accuracy and completeness with which users acieve goals; • Satisfaction measures the freedom from discomfort, and positive attitudes towards the use of the product. Marianne Jahn TU-Vienna

  12. Data Usability • Data with their Charakteristics: (guaranteed) quality, quantity, structure,.... • Users with their Objectives : profiles, personal experiences,... • Methods with their Design: encompassing some intrinsic capabilities of the methods to improve human knowledge Marianne Jahn TU-Vienna

  13. Toolbox to Describe Usability Marianne Jahn TU-Vienna

  14. Toolbox to Measure Usability The Information Quality is one major factor to describe usability of data quality for user groups Definition of Information Quality: Terms like „satisfying answer“ and „best results“ in the general problem statement are interpreted as a query response of high information quality (IQ). To assess and maximize the information quality of an answer, an IQ-measurement is necessary. Marianne Jahn TU-Vienna

  15. Information Quality Marianne Jahn TU-Vienna

  16. Maslow Pyramid Marianne Jahn TU-Vienna

  17. Toolbox for User Requirements Variable C Variable B Variable A Marianne Jahn TU-Vienna

  18. Toolbox for User Requirements Variable B Variable C Variable A Marianne Jahn TU-Vienna

  19. Example • Details: • Radar, Roadworks, Trafficjam information,… • Parking places, Possibilities to aquire tickets,… • Public transport stations, nightbuses, timetables,… • Gasstations, shopping centers, ... • Embassies, sights, tourist-info, parks,… • Bicycle-routes, …. Details Design load Turn restriction Oneways Attainability of Compartments Main routes Basic Network Marianne Jahn TU-Vienna

  20. Conclusion and Further Work Toolboxes: for identification of user groups describing concept of usability measuring usability grading user requirements • Quality assessment by applying Information Quality criteria to the Navigation Application • Simulation of Usability and Information Quality process for the different user groups • Analysis and comparison of transport problems and Usability for user groups Marianne Jahn TU-Vienna

More Related