Cost Behavior Assumptions and Limitations

Understanding Analytical Limitations

Cost behavior models simplify reality and rely on several assumptions. Analysts should understand these limitations before making important business decisions.

• Cost behavior remains constant only within the relevant range.
• Selling prices are assumed to remain constant.
• Sales mix is assumed to remain stable.
• Costs may change because of inflation or efficiency improvements.
• Real-world conditions often require professional judgment.

Understanding how costs behave is the first step toward managing profitability.