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CROWDSOURCING

Hristo Kolev

Decision Science
Dr. Elitsa Alexander
Definition

Crowd

Outsourcing

Crowdsourcing

• Crowdsourcing system enlists a crowd of humans to help solve a problem
defined by the system owners
• Compared to the physical world, the Web can dramatically improve existing CS
systems and give birth to novel systems types.
• The web is unique in that it can help recruit a large number of users, enable a

high degree of automation, and provide a large set of social software
2
Examples of CS

Explicit

Implicit

3
4 Key Challenges for CS systems

How to recruit
and retain
users?

What
contributions
can users
make?

How to
combine user
contributions?

How to
evaluate
users and
contributions?

4
Classifying Crowdsourcing
Nine dimensions of CS systems. The middle four refer respectively to how a CS
system solves the four fundamental challenges.

Degree of Manual
Effort

How to Recruit
and Retain Users

Role of Human
Users

What Can
Users Do

Nature of Collaboration

Standalone vs Piggyback
Architectures

How to Combine
Inputs

How to
Evaluate

Type of Target Problem

5
What next?
Crowdsourcing is expected to grow rapidly in the near future in three major
directions:
• More Generic Platforms: the race is now on to move beyond building
individual systems, toward building general CS platforms.
• More Application and Structure: CS to be applied to ever more classes of
applications.
• More Users and Complex Contributions: engage ever broader range of users
and to enable them to make increasingly complex contributions.

6

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Crowdsourcing

  • 2. Definition Crowd Outsourcing Crowdsourcing • Crowdsourcing system enlists a crowd of humans to help solve a problem defined by the system owners • Compared to the physical world, the Web can dramatically improve existing CS systems and give birth to novel systems types. • The web is unique in that it can help recruit a large number of users, enable a high degree of automation, and provide a large set of social software 2
  • 4. 4 Key Challenges for CS systems How to recruit and retain users? What contributions can users make? How to combine user contributions? How to evaluate users and contributions? 4
  • 5. Classifying Crowdsourcing Nine dimensions of CS systems. The middle four refer respectively to how a CS system solves the four fundamental challenges. Degree of Manual Effort How to Recruit and Retain Users Role of Human Users What Can Users Do Nature of Collaboration Standalone vs Piggyback Architectures How to Combine Inputs How to Evaluate Type of Target Problem 5
  • 6. What next? Crowdsourcing is expected to grow rapidly in the near future in three major directions: • More Generic Platforms: the race is now on to move beyond building individual systems, toward building general CS platforms. • More Application and Structure: CS to be applied to ever more classes of applications. • More Users and Complex Contributions: engage ever broader range of users and to enable them to make increasingly complex contributions. 6