When Jim DeLash, Omnichannel Marketing Director at GSK, read the results of a 2021 survey about marketers' Briefs to agencies, he was shocked by the misalignment of perspectives it revealed. He decided to do some research of his own about what was going on in GSK and, in response to that, launched The Isosceles Project. It was a bold attempt to improve the Briefs from his marketing teams, raise the agencies' game, and build solid metrics and testing into the Brief from day one. He talked about the ups and downs of his triangular journey with Jonathan Elliott.