Migrated from eDJGroupInc.com. Author: Greg Buckles. Published: 2015-11-17 19:00:00Format, images and links may no longer function correctly. 

I trust my readers to take me to task and keep my blogs accurate with immediate feedback. In response to yesterday’s blog on acceptable confidence levels, I received several complementary emails and one that bluntly called the entire survey question and post “wrong-headed”. My expert friend and critic was right on the money when he pointed out that a confidence level or interval is a sampling measurement rather than a measurement of how accurate or stable your PC-TAR relevance model has become through the sampling/training process. I don’t want to dive back into precision, recall, F1 and other statistical jargon. The PC-TAR promoters have spent 2-4 years trying to educate attorneys and lit support practitioners on the wonders of machine learning with limited success. The smart marketers have dumbed down the ‘when to stop’ message and mistakenly promoted simplistic concepts of ‘98% confident’ because they resonate with consumers. I fell prey to this dumb-speak and promise to do better in future surveys and blogs. The question sought to understand whether practitioners had arrived independently at a standard measurement for completeness when using PC-TAR for typical civil litigation responsiveness retrieval. These are the kinds of questions that our consulting clients ask all the time, “How are others setting the defaults on Relativity Assisted Review training?” In fact, sampling confidence level is one of the first decisions that eDiscovery counsel have to answer. Essentially, how big do our sample training sets need to be for an acceptable level of confidence in the resulting recall, precision and stability? That is easy to understand, much easier than F1 stability, overturn rates and the other measurements that actually support the final ‘when to stop’ decision. No one likes the quenticential consultant/counsel answer to every question, “It depends.” But that is what every interview respondent said when pressed. There is no standard measurement of completeness for PC-TAR yet. Having one would speed adoption, but be wrong in too many instances. Thank you all for the feedback, good and bad. It helped further the discussion and clarified an important point. Keep it up!

Greg Buckles wants your feedback, questions or project inquiries at Greg@eDJGroupInc.com. Contact him directly for a ‘Good Karma’ call. His active research topics include analytics, mobile device discovery, the discovery impact of the cloud, Microsoft’s Office 365/2013 eDiscovery Center and multi-matter discovery. Recent consulting engagements include managing preservation during enterprise migrations, legacy tape eliminations, retention enablement and many more.

Blog perspectives are personal opinions and should not be interpreted as a professional judgment. eDJ consultants are not journalists and perspectives are based on public information. Blog content is neither approved nor reviewed by any providers prior to being posted. Do you want to share your own perspective? eDJ Group is looking for practical, professional informative perspectives free of marketing fluff, hidden agendas or personal/product bias. Outside blogs will clearly indicate the author, company and any relevant affiliations. 

0 0 votes
Article Rating