Itamar Gilad is author of Evidence-Guided, which outlines a new product development meta framework called GIST. Itamar is also a speaker and a coach, previously working at Microsoft and Google. During his time at the latter, he came up with the idea for the tabbed inbox, which is now a core feature of the email product.In today's episode:• The risk of opinion-based development (Google +)• A run through of Itamar's new GIST Evidence-Guided framework• How to become evidence-guided in your company—Itamar's contact and company info:• LinkedIn: https://www.linkedin.com/in/itamargilad/• Twitter: https://twitter.com/ItamarGilad• Website: https://itamargilad.com/—Where to find the host, Adam Wakeling:• Twitter: https://twitter.com/adamjwakeling• LinkedIn: https://www.linkedin.com/in/adam-wakeling-26494b35/—In this episode, we cover:(00:00) Preview(00:45) Introduction(02:40) The story of Google+ and why it failed(05:23) The story of Gmail tabbed inboxes and why it succeeded(08:40) Tabbed Inbox timeline(09:58) GIST introduction(11:44) How long it took to create GIST(12:59) Difference between data- and evidence-guided(14:11) Goals in GIST(17:10) The challenge of the right Northstar metric  (19:30) Why Meta/Facebook's Northstar is not ideal(21:16) Ideas in GIST (23:10) Collaboration in ideas (25:00) ICE for prioritization/evaluation (27:25) Impact in ICE explored(29:30) How to calculate confidence in ICE(33:36) The right level of confidence (35:35) Tabbed inbox research and analysis(40:32) Example steps/AFTER framework (43:12) PMs stuck in execution/feature factories  (47:32) Empowering others in Product Discovery(51:02) Tracking Tasks to Goals (52:52) How to integrate GIST into your business (57:44) OutroFollow the podcast on Twitter: @proddevpodcastGet in touch with the host, Adam Wakeling, on Twitter: @adamjwakeling