If you change the duration of the meetings from 60 minutes to 30 minutes, you are altering the social perspective of the meetings. If the standard time is 30 minutes, rapidly, a 45 mins meeting will be seen as a long meeting and employees will try to save time to finish it
For example, individual challenges are more insightful than group challenges because employees will feel more important.
Also, if the number of papers printed is controlled weekly, employees will try to reduce their use of the printing machine and, therefore, the consumption of paper and energy
4 Ways Businesses are Using Nudge Theory: