Project work ranges from Definable Work to High Uncertainty Work.
Definable Work: Definable work projects are characterized by clear procedures that have proved successful on similar project in the past. Few example of Definable work are Car Production, Microwave Oven or Home after the design is complete. In definable work uncertainty is very less. More definable work is automated.
Uncertainty Work: This include work with high rates of change, complexity and risk. High Uncertainty work include work of System engineer, doctors, teachers and lawyers.