3M — The Fences and the Sheep
In 1925, a young 3M lab assistant named Richard Drew was working on sandpaper when he noticed auto-body painters cursing the tape that ruined their two-tone paint jobs. Developing a better tape wasn't his assignment — and the boss, William McKnight, initially told him to get back to sandpaper. Drew kept at it anyway, and McKnight made the decision that built the company: he let him. The result was masking tape, then Scotch tape, and eventually a formal policy famous across industry: 3M researchers may spend 15% of their time on projects of their own choosing. McKnight's management creed, written in 1948, still reads like a Playbook chapter: hire good people, delegate responsibility, tolerate mistakes — because “if you put fences around people, you get sheep.”
Decades later the policy paid its most famous dividend. A 3M chemist named Spencer Silver invented an adhesive that was, by every normal standard, a failure — it barely stuck. For five years he gave internal seminars about his “solution without a problem.” Then a colleague, Art Fry, annoyed that his bookmarks kept falling out of his church choir hymnal, remembered Silver's weak glue during his 15% time. The failed adhesive plus the free time became the Post-it Note — one of the most successful office products in history, born from a failure and a hymn book, inside a company that had left room for both.
The Lesson: Drew disobeyed, McKnight allowed it, and the company institutionalized the allowing. The 15% policy is trust converted into calendar time — and it out-invented every fence ever built.
Playbook connection: Principles 2, 14, and 17.