Projects experience peaks and valleys. Processes experience peaks and valleys. People experience peaks and valleys.

Across the board, the obvious goal would be to promote peaks and lessen the valleys. 

And that is great and all. But if we never experience (or identify) the valley we decrease our opportunity to grow. To explore and experiment. To find new peaks. 

In the valleys, we can find new skills, scripts, and secrets. 

In the valley, we can create new value and have an opportunity to turn everything around and break away from the spec.