This study intends to demonstrate that the cost-volume-profit analysis is based on the analysis of the balance point, of the relations between the prices of goods, the activity’s volume, the unit variable cost, the total fixed costs, the balance of the mixed production, the managerial planning and the decision making is actually a financial model which highlights the changes occurred in the profit size as a consequence of the amendment of the sold volume of good, of the selling price and of the manufacturing costs. The case study was conducted in Mol Romania, an economic entity with integrated activity on oil and natural gas. The CPV relation offers a general model of the economic activity.The study ends up with conclusions in what concerns the advantages offered by the analysis which can be made on the basis of the cost-volume-profit relation and that can be implemented in the decision making process