Usually the firms play the simulation for two years. Within these two years there are for sure different type changes in the business (PESTEL = political, economic, social, technological, legal or environmental) environment. Political situation may change (Brexit, new presidents and/or governments). Economical changes include the rise or fall of an economy and the fluctuation of currencies/interest rates. Competitors introduce new technologies and make new partnerships. Earthquakes, floods and pandemia create catastrophes. These all create uncertainty which complicates decision making. Participants learn decision making in ever-changing environment.