Michelle Holliday has written a splendid exploration of the deep value of improv.

..the true promise of improvisation is that it helps us move beyond a mechanistic paradigm to one that honours and embraces life. It literally holds the key to being less rusty and more fully thriving and alive. And paradoxically, in becoming more fully alive, we become more effective according to all the measures that the mechanistic paradigm holds dear – especially in our organizations.