Following on from a strategic planning exercise, librarians and others can use the scenarios as mental models to look for and identify signs of change, to alert an institution if it needs to take action. The physiological reason for this is that the brain matches incoming signals to existing models in the brain – and so is more likely to recognise signals of change with a set of possible scenarios. One way of heightening this capability is through ‘early indicators’ which are headlines which would appear earlier, and are easy to spot, if a particular scenario was unfolding. A range of exemplar early indicators has been identified for each scenario and others will normally be added as a part of the strategic planning process.