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By John Tredennick

Extract: I am not aware of any research suggesting that keyword search can match the results of a good predictive analytics process across the board. In particular, it is rare to hear about keyword searches getting much above 75 or 80% recall. Perhaps others’ experiences are different but any conclusions should be backed by rigorous analysis (across a wide variety of cases) of the documents that did not return as well as those that did.

Given that you can rarely tell in advance which case is right for a keyword-only approach, it is hard to see why a legal team wouldn’t include predictive analytics as a core strategy. At the least, we need to measure the cost of Predict against the hourly cost of developing and running a keyword process. To that we would add the results differential (recall and precision) before making a comparison.

 

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