Source : Webster's Revised Unabridged Dictionary (1913)

Criticalness \Crit"ic*al*ness\, n.
   1. The state or quality of being critical, or of occurring at
      a critical time.

   2. Accuracy in examination or decision; exactness.

Source : WordNet®

criticalness
     n : a state of critical urgency [syn: {criticality}, {cruciality}]