"A wicked problem is defined as one with the following properties:1 1) You do not understand the problem until you have developed a solution. Different stakeholders might disagree on some or all aspects of another stakeholder’s definition to the problem, if they are personally invested in pursuing a particular solution. 2) There is no stopping rule. Because neither the problem nor its potential solutions are definitive, there is no obvious point or stage at which problem solving activities can be curtailed. 3) Solutions to the problem are not right or wrong. Rather, you can have solutions that are viewed as “better” or “worse” by consensus of the stakeholders. 4) Every solution to the problem is a ‘one-shot operation’. An enacted solution causes new aspects of the problem to emerge, which must then be dealt with in turn, using follow-up solutions. 5) Wicked problems have no given alternative solutions. Many potential solutions could be thought of, but only some will be appropriate to pursue, depending on the problem’s individual nature and social context. 6) Each problem is essentially unique. The source of wickedness lies in the social complexity of the stakeholders, and this will always vary from case to case. Glossary of related terms Complexity: In the context of project management, complexity is the number of components required to solve a problem, and the nature of the interactions between all components2. In complexity theory, the gradient of increasing complexity can be divided into ordered (where interactions between components are known or knowable), and unordered (where these relationships are unknown or disputed)3,4. Wicked problems thus represent problems with unordered complexity. Tame: A problem which falls within the ordered domain of complexity theory. The components to the problem may vary in number, but their interactions are known or knowable4. Simple: A tame problem with few components, which share known interactions4. Complicated: A tame problem with many components, which share known or knowable interactions4."