How do managers decide whether a cost is variable or fixed cost?

Managers classify costs as variable or fixed based on their behavior in relation to production levels. Variable costs change directly with the volume of goods or services produced, such as materials and labor, while fixed costs remain constant regardless of production levels, like rent and salaries. They analyze historical data, project future production needs, and consider the nature of each cost to make this determination. Understanding these distinctions helps managers in budgeting, forecasting, and pricing strategies.