- Search engines currently struggle with queries where recall is more important than precision, such as exploratory search questions where the user wants to find all relevant information. - Endeca develops software to help users explore and understand complex information through an approach called "guided summarization" which aims to improve communication between the user and system. - Guided summarization presents search results to users in contextual summaries and offers options for refinement, aiming to cheat the typical recall vs. precision trade-off by facilitating an interactive dialog between the user and data.

1. Is Search Broken?! Daniel Tunkelang Chief Scientist, Endeca

5. some of our customers

8. search hits a wall in ecommerce

9. search hits a wall in knowledge management Current Search: it outsourcing

10. search even hits a wall on the web Results 1-10 out of about 344,000,000 for ir

12. the accountants don’t think so

13. most users don’t think so 75

17. precision = fraction of retrieved documents that are relevant recall = fraction of relevant documents that are retrieved retrieved documents relevant documents

18. why improve precision? the truth, nothing but the truth

19. why improve recall? the whole truth,

20. what we want… the truth, the whole truth, nothing but the truth

21. but there is a trade-off… recall precision

22. which should we favor? Precision …to avoid annoying users with irrelevant results? Recall …to make sure we don’t throw away results the user wants / needs?

24. depends on what you want vs.

30. with apologies to luis von ahn

32. hcir cheats the trade-off recall precision

36. guided summarization for KM

38. facets 101

40. showing the right facets: microwaves vs.

41. showing the right facets: ceiling fans

42. traditional topic taxonomy

44. facets populated using entity extraction apple production

45. cutting through facets to show the big picture Search : storage

46. summarization: more than search and browse

51. maybe we should treat search as a game