WorldGMC | 995 followers on LinkedIn. The world's largest management competition based on a business simulator! | The Global Management Challenge is the largest Strategy and Management Competition in the world. Launched in Portugal in 1980, by SDG and the EXPRESSO newspaper, more than 500.000 competitors comprising a range from company executives to university students have participated worldwide. The Global Management Challenge has become a high profile and visible event in more than 30 countries where it is held, adding prestige to the many participating organizations.