Enough Sleep is very improment to be efficient,
I belive Efficiency is ability to find iceberg before it hits the Titanic
- The demands and expectations of our modern society have placed increasing demands on our time, and more than ever people are making up for those demands by cutting back on sleep.
- At the same time, it is becoming increasingly clear that the cost of insufficient sleep is much higher than most people recognize.
- Scientific research is revealing, for example, how sleep loss, and even poor-quality sleep, can lead to an increase in errors at the workplace, decreased productivity, and accidents that cost both lives and resources. Awareness can help you improve your sleep habits and in turn your safety.
Here is good article showing scientific proves on it 🙂
http://healthysleep.med.harvard.edu/healthy/matters/consequences/sleep-performance-and-public-safety