1999 a clever man (P. Drucker) stated: “Knowledge worker productivity is the biggest of the 21st-century management challenges.” In this short quote lies a lot of truth for today. The ability to attract and unleash the full potential of knowledge workers is a fundamental comparative advantage for nearly every company. All collaboration solutions support this goal and many companies have realised it today. But how do you measure the productivity of your knowledge workers and their departments? What are the KPIs and the soft factors? And how can get your butterflies up in the air and cause a perfect storm of activity, teamwork and business output? In my session I will introduce our Business Productivity Index as a proven method for all that and show you the use cases. I will show it as way that might connect your business expectations with the needs of your knowledge workers and the right course of action. After that we can discuss the right tools, but first let’s talk about butterflies.