Attacking information overload in software development

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1 Attacking information overload in software development Gail Murphy University of British Columbia Tasktop Technologies This talk contains copyright pictures obtained under license. The license associated with this talk does not apply to these pictures.

This talk contains copyright pictures obtained under license.

2 sumerian language g clay tablet BC source: Wikipedia

4 source: The University of Iowa Libraries

5 source: The University of Iowa Libraries

6 source: The University of Iowa Libraries

7 source: The University of Iowa Libraries

8 14.8 million books (English/Spanish) in print today download 250 items at a time

11 information explosion information overload indecision repetition

12 from anywhere, anytime, anyone to the right information at the right time, in the right place, in the right way to the right person G. Fischer, Int l Workshop Series on RFID, 2004

13 challenge: weak structure some explicit connections many inferred connections

14 software development: a subset with stronger structure

15 software development: a subset with stronger structure

18 right information right time right place right way right person

19 group memory episodic memory Hipikat Mylyn

20 group memory: Hipikat across time and space, developers leave a digital trail of information about a project form an implicit group memory from the digital trail enable a developer to query the group memory for pertinent information joint work with Davor Cubranic

group memory from the digital trail enable a developer to query

21 writes Person posts writes works on File revision ii implements >356,000 Message reply to >56,000 about Change/ Bug >69,000 similar to Document similar to documents

22 metadata writes Person posts writes works on File revision ii implements >356,000 Message reply to >56,000 about Change/ Bug >69,000 similar to Document similar to documents

23 heuristic writes Person posts writes works on File revision ii implements >356,000 Message reply to >56,000 about Change/ Bug >69,000 similar to Document similar to documents

24 information retrieval writes Person posts writes works on File revision ii implements >356,000 Message reply to >56,000 about Change/ Bug >69,000 similar to Document similar to documents

25 recommending writes Person posts writes works on File revision ii implements >356,000 Message reply to >56,000 about Change/ Bug >69,000 similar to Document similar to documents

27 does it work? 20 random bugs from Eclipse ; assess files recommended precision: 0 to 0.56 ; recall: 0 to 1 easy task 75% 25% difficult task 75% 50% 75% of newcomers handled 50% of newcomers met basic special cases correctly compared req. compared to 75% of experts to only 25% of experts

28 right information? right time? right place? right way? right person?

29 right way? current past

30 right way? weak rationale for recommendations significant ifi cognitive i effort to apply information overload cognitive overload

31 episodic memory: Mylyn as a developer works, build a task context that includes a degree-ofinterest (DOI) for each item of information interacted with focus the display of information using a task s context support collaboration through sharing of task contexts joint work with Mik Kersten

33 interest

35 task (bug) #1 task (bug) #2

37 Mechanism Description Applies to Filtering Exclude display of List, tree, graphical elements with DOI views below a threshold Ranking Display elements List views, children sorted by DOI values within tree nodes Decoration Indicate DOI values Any view with foreground or background colour Expansion Expand tree nodes to Any tree view management show elements with certain properties

38 task (bug) #1 task (bug) #2

40 does it work? field study with 16 industry participants edit ratio = # edits / # selections 200 percentage change in edit ratio developer ids

41 right information? right time? right place? right way? right person?

42 instead of

43 500,000 programmers are working like this

44 development tasks have emergent structure

45 an anchor for other recommendations run unit tests related to task context + enables easier running of more cases

46 an anchor for other recommendations active search - difficult to scope

47 an anchor for other recommendations Hipikat-like yet to be built!

48 right way? reduces friction encourages flow information overload cognitive overload

49 what about other knowledge workers? interaction relatively agnostic to target

50 knowledge worker field study (early Mylyn) y average average scattering tagging path directory ratio length density

51 Tasktop p( (extend Mylyn yy beyond programming) g)

52 meghan allen meghan allen john anvik john anvik elisa baniassad elisa baniassad wesley coelho wesley coelho davor cubranic davor cubranic briande alwis brian de alwis rob elves rob elves thomas fritz thomas fritz jan hannemann jan hannemann lyndon hiew lyndon hiew reid holmes reid holmes mik kersten mik kersten seonah lee seonah lee shawn minto shawn minto martin robillard martin robillard izzet safer izzetsafer david shepherd david shepherd ducky sherwood ducky sherwood annie ying annie ying trevor young trevor young robert walker robert walker and others! and others!

53 so information information information information information i Information information

54 overload leads to indecision repetition memory-model inspired attacks Hipikat and Mylyn

55 recommendations can be about less and not just about more murphy

So today we shall continue our discussion on the search engines and web crawlers. (Refer Slide Time: 01:02)

So today we shall continue our discussion on the search engines and web crawlers. (Refer Slide Time: 01:02) Internet Technology Prof. Indranil Sengupta Department of Computer Science and Engineering Indian Institute of Technology, Kharagpur Lecture No #39 Search Engines and Web Crawler :: Part 2 So today we