Intro...

TODO: intro......

Some Examples of Search Engine AB Testing

Outline for one possible AB testing tool:

"Delta Testing": A variation of AB testing tool:

The rationale here is that if both engines agree on a document, there's less benefit in having a human tester look at it.  Of course both engines could made a mistake and brought back an incorrect document, but spot checks should be used to detect that.

Web Site "Secret" AB testing...