Figure 1.7 | Assessing adaptation solutions and success. A solution is defined as an adaptation option which is effective, feasible and conforms to principles of justice. These attributes can be assessed ex ante during adaptation planning. During implementation, the overall success of a response can be judged via monitoring and evaluation of these attributes. Adaptation unfolds as an iterative learning process of assessment, implementation, monitoring, adjustment and learning. A set of responses is adequate to the extent that they sufficiently reduce climate risk to levels considered tolerable. Adaptation may not fully avoid residual risks, but the more adequate the response, the less residual risk remains. Adaptation also has limits beyond which it is no longer possible to avoid intolerable risks and impacts.