5.4.1 Classifying Costs
The Strategic Cost Workshop
Understanding how costs behave is fundamental to strategic decision-making, pricing strategies, and profitability analysis.
📊 The Cost Classification Framework
Classification by Output
Fixed Cost (FC)
Does NOT change with output level. Examples: Rent, Manager salaries, Insurance.
Graph: Horizontal line
Variable Cost (VC)
Changes DIRECTLY with output. Examples: Raw materials, Piece-rate wages, Packaging.
Graph: Diagonal line from origin
Total Cost (TC)
TC = Fixed Cost + Variable Cost
Graph: Starts at FC height, slopes upward
Classification by Object (Allocation)
Direct Cost
Can be clearly identified with a specific unit/product.
Example: The engine in a car, wood for a table
✓ Easy to allocate to cost objects
Indirect Cost (Overhead)
Cannot be identified with one specific unit. Must be "shared" across products.
Example: Factory lighting, receptionist salary, building rent
⚠ Requires allocation method
Strategic Insight: A cost can be BOTH classifications simultaneously. For example: Packaging is Variable (by output) AND Direct (by object). Factory rent is Fixed (by output) AND Indirect (by object).
📈 The Cost Graph Builder
Fixed Cost Behavior
$1,000
Same at all output levels
Variable Cost per Unit
$5
Multiplied by output quantity
Total Cost Formula
TC = FC + (VC × Q)
The fundamental cost equation
🎚️ The Output Simulator
Fixed Cost
$1,000
Rent (unchanged)
Variable Cost
$250
50 × $5
Total Cost
$1,250
FC + VC
Cost per Unit
$25.00
TC ÷ Output
Strategic Observation: Notice how cost per unit DECREASES as output increases? This is "economies of scale" - fixed costs are spread over more units, reducing average cost.
🎯 The Classification Challenge
Classify each cost item by BOTH dimensions. Real business costs can be complex!
Wood for Table Manufacturing
Classification by Output:
Classification by Object:
Factory Rent
Classification by Output:
Classification by Object:
Electricity for CNC Machine
Classification by Output:
Classification by Object:
Production Manager's Salary
Classification by Output:
Classification by Object:
Cardboard Packaging Boxes
Classification by Output:
Classification by Object:
Factory Building Insurance
Classification by Output:
Classification by Object:
🎯 Strategic Mastery Checkpoint
Why This Matters for Business Strategy:
- • Break-even Analysis: Requires separating fixed and variable costs
- • Pricing Decisions: Must cover variable costs at minimum
- • Budgeting: Fixed costs create minimum financial commitments
- • Product Costing: Direct costs enable accurate unit profitability
Exam Excellence Tips:
- • Always specify the time period when discussing fixed costs
- • Use precise examples from the case study context
- • Remember: costs can be semi-variable (partly fixed, partly variable)
- • Link cost behavior to strategic implications (margins, breakeven)
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