Explain the concept of the relevant range?

The relevant range refers to the level of activity or volume within which fixed and variable cost behavior remains consistent. It is the range of production or sales levels where the assumptions about cost behavior, such as fixed costs remaining constant and variable costs per unit being stable, are valid. Outside this range, costs may change, potentially leading to different cost structures and affecting decision-making. Understanding the relevant range is crucial for budgeting, forecasting, and cost management.