One predictable outcome of increasingly constrained managed systems and climate change effects is an increase in the uncertainty of predictions of how these systems will function. It is important for scientists and analysts to communicate this uncertainty so that it becomes useful information in management decision-making and policy formulation. This indicator refers to both the act of communication and the nature and content of communication. In other words, just narrative descriptions of uncertainty may be an insufficient level of information for many types of management decision-making, but may be sufficient to build responsive policies.