Playbook updates: New Rapid Product Validation Section and Designing Section Updates Over the last few months, we’ve made some big changes to our playbook. We’ve added a new section, Rapid Product Validation, and updated our Designing section. Kyle Fiedler April 7, 2020 design process jobs-to-be-done continuous improvement playbook design sprints validation user interviews user experience user research user interface virtual hugs values successful products product