It's the 20th anniversary of the book Learning to See, the popular instruction manual for Value Stream Mapping (VSM). Since the book's publication, VSM has become the tool for analyzing and designing work flows at the door-to-door system level. Recently Mike Rother and Jeff Liker sat down to reflect on things they've learned about VSM, and captured their thoughts in short presentation. Mike shared it with us and we'd like to share it with you!