Wildfires are extremely difficult to manage and control. If they grow out of control, they are capable of destroying countless resources and entire populations. Over the years, resources and tactics have been focused on improving reactive capabilities. However, adopting a proactive approach can reduce reaction time and the necessary resources when action is needed for suppressing a fire. Both the proactive and reactive phases of wildfire management involve numerous systems that need to communicate and collaborate. When a collection of systems is working together towards a goal, it is beneficial to see them as a System of Systems. This thesis takes a System of Systems approach to wildfire management and examines modelling and simulation considerations, with special interest in methods that can be used to obtain a refined set of system requirements. More specifically, aircraft requirements for the concept generation of firefighting aerial vehicles. Additionally, the thesis considers stakeholders’ needs and the consequent viewpoints reflecting their interests and concerns, which are necessary for developing high-level operational concepts. These topics are often overlooked, yet necessary to keep communities engaged and to develop measures of effectiveness and performance that capture the value of different System of Systems combinations. All these considerations are intended to contribute to the improvement of holistic requirement generation for product development.