Design Thinking is especially useful when it comes to solving “wicked problems”. The term “wicked problem” was coined by design theorist Horst Rittel in the 1970s to describe particularly tricky problems that are highly ambiguous in nature. With wicked problems, there are many unknown factors; unlike “tame” problems, there is no definitive solution. In fact, solving one aspect of a wicked problem is likely to reveal or give rise to further challenges. Another key characteristic of wicked problems is that they have no stopping point; as the nature of the problem changes over time, so must the solution.