Duncker found that as his subjects worked on these problems, they simultaneously changed their understanding of the goal and assessed solutions. A subject might think of a solution, try it out, realize it would not work, realize what was missing, and then add to the definition of the goal. This new definition would suggest new approaches, and when these approaches failed, they helped to clarify the goal even further.
This.highlights a challenge with goal-setting in general and goal based delegation in particular. If unconstrained, the goals frequently change to account for new information and understanding. If goals are fixed, then this active iteration on the goal itself may be hindered.
