Decision making for managers in a fire situation can be very complicated. The information brought to the decision maker must be well though out and accurate. Before meaningful strategy can be formulated, realistic agreed-upon objectives for the incident are needed. With objectives documented, they act as screens for the strategy and further test the tactics that are developed once the general strategy emerges and is agreed to. The prescription for action on the incident is the tactics. These are determined after the objectives and strategy are in place. Many forces are at work that have the ability to cause change in strategy and tactics: fuels, terrain, weather, availability of resources, political agreement with objectives. Risk is an important factor. Success in the prescribed natural fire program often depends on the manager's capacity to take risks.