Profitability analysis is the process of evaluating the profitability of your products, services, customers, segments, channels, or regions. It involves calculating and comparing the revenues, costs, and profits associated with each unit of analysis. This process can be done at varying levels of detail and complexity, depending on your objectives and data availability. The main methods of profitability analysis are contribution margin analysis, gross margin analysis, and net margin analysis. Contribution margin analysis calculates the difference between the sales revenue and the variable costs of each unit of analysis. It's useful for pricing, product mix, and break-even decisions. Gross margin analysis calculates the difference between the sales revenue and the cost of goods sold (COGS) of each unit of analysis. It can help with cost control, inventory management, and margin improvement decisions. Lastly, net margin analysis calculates the difference between the sales revenue and the total costs (including COGS, overhead, and taxes) of each unit of analysis. This method is useful for profitability evaluation, performance measurement, and value creation decisions.