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USABILITY ASSESSMENT FRAMEWORK FOR CODE GENERATORS USING ANALYTICAL HIERARCHY PROCESS

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USABILITY ASSESSMENT FRAMEWORK FOR CODE GENERATORS USING ANALYTICAL HIERARCHY PROCESS. Joshua R. Dolecal Dahai Liu Remzi Seker Andrew Kornecki Department of Human Factors and Systems Embry-Riddle Aeronautical University Daytona Beach, Florida. Outline. Usability Code Generation

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USABILITY ASSESSMENT FRAMEWORK FOR CODE GENERATORS USING ANALYTICAL HIERARCHY PROCESS

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  1. USABILITY ASSESSMENT FRAMEWORK FOR CODE GENERATORS USING ANALYTICAL HIERARCHY PROCESS Joshua R. Dolecal Dahai Liu Remzi Seker Andrew Kornecki Department of Human Factors and Systems Embry-Riddle Aeronautical University Daytona Beach, Florida

  2. Outline • Usability • Code Generation • Rationale • Framework • AHP • Results

  3. Usability • Also called: Usability Engineering, Human Factors, Ergonomics, and User Centered Design. • UCD is defined as “the practice of designing products so that users can perform required use, operation, service, and supportive tasks with a minimum of stress and maximum of efficiency. (Woodson,1981) • Nielson (1993) defines Usability as the overall acceptability of a system.

  4. Usability Criteria • Learnability • How easy something is to learn • Efficiency • Of the product (how well it aids users in performing tasks) • Memorability • How easy it is to remember skills learned/used • Errors • Error prevention, correction, and identification • Satisfaction • How well users are satisfied with the product

  5. Process of Generating Code • Select template • Create a model/chart/diagram • Select output language (C/C++, Java, Ada…) • Generate Code (Stephens, 2002)

  6. Rationale • ACG is relatively new • ACGs will change the way companies work and SW is developed • Usability need to be addressed, for special users • Experts (Computer Programmers) • Little research done

  7. Framework

  8. Framework • General Usability Criteria • (Nielson, 1993) Basic well accepted usability • Specific Usability Criteria • (Stephens, 2002 & Whalen, and Heimdahl, 1998 & Maclay, 2000, etc.) • Elements that are unique to ACGs according to the current literature

  9. Method • AHP framework constructed • Usability criteria and • ACG functional analysis • 8 Graduate students gave pairwise comparison. (~6 months exposure with ACGs) • AHP weight • Consistency

  10. Analytical Hierarchy Process • 3 Main steps • Establish a hierarchy • Calculate pair-wise comparison weights • Check for consistency • Apply weights to gathered data (objective/subjective) • Process can be Automated using Expert Choice • http://www.expertchoice.com/

  11. AHP Values Thomas Saaty (1982)

  12. Thomas Saaty (1982)

  13. 4 Step Consistency Process • Thomas Saaty (1982)

  14. Consistency • When dealing with many criteria/variables, people are not going to be perfectly consistent. It is up to you to review their decisions with them such that the “decision maker” understand transitivity. • E.g. If A > B and B > C then A > C

  15. Results

  16. Results

  17. Results

  18. Results • Semantic consistency and User satisfaction received the highest weights, but traversing up the hierarchy we see the Translator and then Specific Usability Criteria received the highest weight • A customized answer was produced • Best product for your situation • Does not label products as better than others • Allows a combination of subjective & objective data

  19. Questions, Comments?

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