The variables you test for a valuation depend on the type and purpose of your valuation, as well as the data and information you have available. However, some of the most important and common variables to test are income, expenses, vacancy, cap rate, and discount rate. For example, when testing income, you can consider market trends, tenant mix, lease terms, and incentives. When testing expenses, you can look at property condition, maintenance requirements, and management efficiency. Vacancy should also be tested considering supply and demand, tenant turnover, and leasing activity. Additionally, cap rate should be tested based on market conditions, property quality, location, and risk profile. Finally, discount rate should be tested based on investor preferences, opportunity cost, and market expectations.