In Cost–Volume–Profit (CVP) analysis, what direct and indirect cost factors should a business evaluate when deciding whether to outsource a product or service, and what are the key differences between fixed costs and variable costs (with examples) as production or sales volume changes?

What you are being asked to do in CVP terms

This question has two parts. First, you need to separate costs into direct (traceable to the product/service) and indirect (support or overhead) and decide which of those costs actually change if you outsource. Second, you need to explain how fixed and variable costs behave when volume changes, using simple examples.

Outsourcing decision: direct cost factors (make vs buy)

Direct costs are the easiest to compare because they are usually tied to each unit or each job.

Key direct-cost factors to evaluate:

• Direct materials saved: If you stop making the product, do you stop buying the raw materials? Example: wood, metal, ingredients.
• Direct labour saved: Will workers be removed from the cost, or will they be kept and moved elsewhere? Example: assembly workers paid per hour.
• Other direct, per-unit costs: Costs that rise with each unit. Example: per-unit packaging, per-unit machine power, per-unit commissions for production.
• Supplier price per unit (purchase cost): Compare supplier quote to your avoidable direct cost per unit.
• Quality and scrap/rework differences: If outsourcing reduces defects, it can lower direct rework materials and labour.

A useful CVP-style comparison is:

• In-house avoidable direct cost per unit vs supplier price per unit.

Outsourcing decision: indirect cost factors (overheads and hidden support costs)

Indirect costs (overheads) matter because many of them do not disappear when you outsource.

Key indirect-cost factors to evaluate:

• Avoidable vs unavoidable overheads:
• Avoidable indirect costs: will actually drop if you outsource (for example, a supervisor role you can remove, a leased machine you can cancel).
• Unavoidable indirect costs: stay even if you outsource (for example, factory rent that you still pay, head office salaries, depreciation on equipment you still own).
• Extra indirect costs created by outsourcing: supplier audits, quality inspection staff, legal/contract admin, extra warehousing, extra transport coordination.
• Risk-related indirect costs: late deliveries, supply disruption, price increases after contract ends, currency risk for overseas suppliers.
• Impact on capacity and other products: if outsourcing frees capacity, you might earn more by using that capacity for another product (an opportunity cost/benefit).

Fixed vs variable costs: simple differences with examples

Fixed costs (total stays the same, per unit changes)

• Definition: Fixed costs do not change in total when volume changes, within a “relevant range”.
• Example: Rent = $5,000 per month.
• Make 1,000 units: fixed cost per unit $= 5000/1000 = $5
• Make 2,000 units: fixed cost per unit $= 5000/2000 = $2.50
• Behaviour: Total fixed cost stays at $5,000, but cost per unit falls as you make/sell more.

Variable costs (total changes, per unit stays the same)

• Definition: Variable costs change in total in direct proportion to volume.
• Example: Materials = $3 per unit.
• 1,000 units: total variable cost $= 3 \times 1000 = $3,000
• 2,000 units: total variable cost $= 3 \times 2000 = $6,000
• Behaviour: Variable cost per unit stays about $3, but total variable cost rises as volume rises.

Why this matters in CVP decisions

CVP focuses on how profit changes with volume: $$\text{Profit} = (\text{Sales} - \text{Variable costs}) - \text{Fixed costs}$$ When you outsource, you are usually converting some costs from “make” (direct labour, direct materials, some overhead) into a “buy” cost (supplier price). The smart move is to compare only the costs that truly change, and ignore sunk or unavoidable costs when choosing.