Benjamin Martin has published "Beta Testing an Online Course" in Learning Solutions Magazine. It details his approach to beta testing online courses and provides practical advice for what is a very important stage of e-learning development. If you are creating e-learning, then you are probably involved in beta testing and will find this article helpful. If you are not beta testing your courses, then you should be and this article can help you get started.
You will need to subscribe to Learning Solutions Magazine or have a membership to the e-Learning Guild to read the article in its entirety. However, associate membership is free and in my opinion an absolute must for anyone in the e-learning field.