Basic Concepts and Cost Behavior
Financial accounting focuses on reliability and creates aggregated reports, while management accounting prioritizes relevance with detailed information for internal decision-making. In organizations, the controller handles financial reporting, cost accounting, and financial analysis, serving primarily as a staff function (advising rather than commanding).
Understanding cost behavior is crucial for business decisions. When analyzing costs, several methods help determine how costs change with activity:
- High-Low Method calculates variable costs using highest and lowest activity points
- Scatter Diagrams visually represent cost relationships
- Least-Square Regression creates the most accurate "line of best fit"
💡 The coefficient of determination (r²) tells you how well one variable predicts another. The closer to 1.0, the stronger the relationship!
Cost-Volume-Profit (CVP) analysis examines relationships between costs, volume, and profits. The break-even point shows where total revenue equals total costs (zero profit). Key formulas include:
- Break-even in units = Fixed Cost ÷ Unit Contribution Margin
- Break-even in pesos = Fixed Cost ÷ CM Ratio
- Margin of Safety = Sales - Break-even Sales
When making decisions using relevant costing, focus only on costs that differ between alternatives. Remember that fixed costs are typically irrelevant unless avoidable, while variable costs and opportunity costs (what you give up) are relevant.
Budgeting
A master budget is an organization's comprehensive financial plan. It starts with a sales forecast (the most difficult part) and includes production, inventory, expense, and cash budgets, ultimately creating projected financial statements.
Operating budgets cover revenues and expenses, while financial budgets deal with assets, liabilities, and equity. Budget approaches include:
- Authoritative (top-down) prepared by management
- Participatory (bottom-up) involves staff input
- Zero-based requires justifying all expenses periodically
Variance analysis compares actual results with budgeted figures. A favorable gross profit variance means actual profit exceeded budget, while an unfavorable variance indicates underperformance.







