The number of people needed to conduct a prescribed fire varies depending upon numerous factors such as size of burn unit, complexity of burn, fuel type(s), fire crew experience, types of firebreaks, equipment availability, and weather conditions. Some prescribed fires can be conducted with as few as two people, while others may require more than 20. Too few people can be as problematic and unsafe as too many people. An experienced fire boss is often the best judge of crew size necessary to conduct a safe burn.