In the current March/April 2017 issue (Volume 34, Issue 2) of the publication "IEEE Software", an article by the authors Niklas Leicht, Ivo Blohm and Jan Marco Leimeister entitled "Leveraging the power of the crowd for software testing" has been published. The paper describes how companies can leverage the potential of the crowd for testing their software and provides action guidelines for doing so. 

Abstracts: 

To profit from crowdtesting, companies can use three approaches: engage an external crowd of Internet users, engage their employees, or engage their customers. Researchers' experiences with these approaches have led to guidelines for establishing crowdtesting. 

The complete article can be foundhere https://www.alexandria.unisg.ch/250676/1/JML_635.pdf.