But it wasn’t Google who invented this practice. They actually borrowed it from 3M, whose own “15% rule” dates back to 1948. In the case of 3M, engineers get to spend 15% of their time pursuing projects of their own devising. For a company with a research budget of over $1 billion, allowing employees the freedom to experiment with 15% of that amounts to an annual $150 million bet on autonomy. But as with Google, the products that have emerged from 3M’s 15% rule have more than covered this bet. Post-it Notes originated from 15% time back in 1974. This one product consistently generates over $1 billion a year in revenue, annually putting the company $750 million in the black, which is quite an upside for its investment in autonomy. … [Read more...] about Why a free afternoon each week can boost employees’ sense of autonomy