I'm not sure exactly how the headline writer got 'three ways' out of this article. By my count it could be four, or more likely, one. Or maybe one thing that is three things, like the Trinity. The article centers around an open-access scholarly publishing platform called F1000Research and cites it as an example of full open peer review. (One?) It references a project to "to test if reviewers would judge research papers differently if they can see who else has reviewed the paper." (Two?) It also describes a tool that does sentiment analysis of peer reviews. (Three?) Finally, it describes an open peer review prediction tool. (Four?) Ah, easier studying the Athanasian Creed.