Modern society, that constantly go through now, requires companies to act in an unstable environment more complex and risky. These features, not encouraging for â€˜healthâ€™ of economic agents acting on the market, is due to structural changes affecting transactions, accelerating technical progress especially through automation, competition between economic blocs, changing consumer preferences with sufficient speed, reducing the average life cycle for some products. The changing environment in which evolving, requires companies, through the pressure they bring, to improve their ability to respond to external factors, in order to ensure maximum security. In these circumstances, managers are first called to assume responsibility browsing paths as sinuous, more flexible, but also calculated best so expensive and limited resources to achieve maximum results. One of the major orientation, effective leaders have successfully used this fluctuating environment, it is analytical or management accounting, whose main component is information on costs. This presents three elements, related in an inseparable unity, as a result of objective conditions of society: costing, information circulated in the management and economic decision - first task of any manager.