1. Shiran Alush Shai Kerer Dor Altshuler Academic instructor: Prof. Ronen Brafman The Decider Group Decision Making

2.  About the project  Main System Functionality  System Architecture  User Interface  Algorithms  Technologies Contents

3. Problem Domain : Group Decision Making  Few friends trying to decide where to go out on Friday night.  large organizations trying to set up a mass event like student's-day or independence-day rally.  public opinion surveys etc. What can you do?  Vote by hand raising/election (works only on simple decisions)  Argue until one takes the lead and decide for everyone (not fair) Problem Definition

4. The Decider © is a new tool for supporting group decision making. Users can define new decision problems, vote for possible choices and courses of action, and reach final decisions using state-of-the-art voting algorithms. The Decider © is an on-line Facebook application, the biggest social network known today, harnessing Facebook’s vast member's community and its social managing tools & features. What is “The Decider” ?

5.  Create questionnaires with four types of possible questions (Choose, Rank, Grade, Budget).  Cast your vote submit your opinions and Express other preferences – For example: "I prefer a yellow Lamborghini over a yellow BMW, but if I must get a white car then I prefer a BMW over a Lamborghini".  Invite others to participate in a questionnaire or join the application.  Decide/View results - Reach a decision in a fair way. Main System Requirements

6. System Architecture The System is an application available as a web service via Facebook at: http://apps.facebook.com/the_decider

7. User Interface

9. Create a New Questionnaire  General information.  Variables and possible values.  Possible dependencies.  Constraints  Advanced settings.  Decision algorithms

10. Cast your Vote/ Express Preferences  Four types of questions.  Easy-to-understand interface.  Express as many different preferences as you wish.  Submit your vote.

11. Calculate Results/ View Statistics  Edit settings.  View results  View statistics.  Delete.  Advanced options (for advance users).

12. Invite your Friends  Send your friends an invitation to join the application on Facebook.  Send your friends a personal invitation to cast their vote on a specific questionnaire.

13. Decision Making Algorithms Choose one Algorithms Plurality Plurality with run-off (two rounds) Ranking Algorithms Borda count Condorcet Plurality with run-off Sequential run-off Extended Condorcet - Copeland Score Algorithms Maximum sum Minimal regret http://www.math.princeton.edu/math_alive/Voting/

14. Technologies

15. Any Questions?