Break-even analysis is used to predict future profits and losses and determine the break-even point, where total revenue equals total costs. There are two types of costs - variable costs that change with production and fixed costs that remain constant. To calculate break-even point, total costs (fixed + variable) are set equal to total revenue. This point is illustrated with a break-even chart and shows the quantity that must be sold to cover total costs without profit or loss. Above this point are profits and below are losses. Assumptions of the analysis include constant prices and costs and that all production will be sold. Limitations include difficulty identifying some cost types and assumptions of stability.