Management Accounting 101: Decision Making with Relevant Costs - Make-or-Buy Outsourcing Decisions

What This Is

A make-or-buy (outsourcing) decision is a critical management accounting decision that determines whether a company should produce a product or service in-house or outsource it to an external supplier. This decision affects the company's costs, efficiency, and competitiveness. For instance, Toyota, a renowned manufacturer of automobiles, has successfully outsourced many of its components, such as engines and transmissions, to specialized suppliers, allowing it to focus on its core competencies and improve overall efficiency.

Key Frameworks & Metrics

• Break-Even Point (units) = Fixed Costs / Contribution Margin per Unit – tells you how many units must be sold to cover all costs.
• Economic Value Added (EVA) = NOPAT? (Capital Invested × WACC) – measures true economic profit after charging for the cost of capital.
• Activity-Based Costing (ABC) – assigns costs to products or services based on their actual consumption of resources.
• Variable Costing – focuses on variable costs, ignoring fixed costs, to evaluate segment performance.
• Residual Income – measures the profit earned by a segment after charging for the opportunity cost of capital.
• Return on Investment (ROI) = Net Income / Total Assets – measures the return on investment, but can be misleading without considering residual income or EVA.
• Make-or-Buy Decision Matrix – evaluates the pros and cons of producing in-house versus outsourcing.
• Total Cost of Ownership (TCO) – considers all costs associated with a product or service, including production, maintenance, and disposal costs.
• Value Chain Analysis – examines the activities that create value for customers and identifies opportunities for improvement.

Step-by-Step Process

1. Identify the Decision Criteria: Determine the key factors that will influence the make-or-buy decision, such as cost, quality, lead time, and strategic alignment.
2. Gather Cost Data: Collect accurate and relevant cost data, including fixed and variable costs, to evaluate the production and outsourcing options.
3. Analyze the Costs: Use tools like ABC, variable costing, and residual income to analyze the costs and identify the most cost-effective option.
4. Evaluate Strategic Alignment: Consider the strategic implications of the decision, including its impact on the company's mission, vision, and values.
5. Consider Qualitative Factors: Evaluate non-financial factors, such as quality, lead time, and customer satisfaction, to ensure that the decision aligns with the company's overall goals.
6. Make a Recommendation: Based on the analysis, make a recommendation to management, including a justification for the chosen option.

Common Mistakes

• Mistake: Treating all costs as relevant when making a make-or-buy decision.
• Correction: Only consider avoidable costs, as fixed costs are often irrelevant to the decision.
• Mistake: Ignoring qualitative factors in the make-or-buy decision.
• Correction: Consider non-financial factors, such as quality and lead time, to ensure strategic alignment.
• Mistake: Using ROI alone without considering residual income or EVA.
• Correction: Use a combination of metrics to evaluate the decision, including ROI, residual income, and EVA.

Decision-Making Tips

• Tip: Always isolate avoidable costs and consider strategic, not just quantitative, factors when making a make-or-buy decision.
• Tip: Use a decision matrix to evaluate the pros and cons of producing in-house versus outsourcing.
• Tip: Consider the total cost of ownership (TCO) when evaluating the costs of production and outsourcing.

Quick Practice Scenario

A company is considering outsourcing its manufacturing process to a contract manufacturer. The contract manufacturer charges $10 per unit, while the company's internal manufacturing cost is $8 per unit. Using ABC, the company determines that the outsourcing option would result in a 20% reduction in setup costs and a 15% reduction in design changes. What is the per-unit cost of the outsourcing option?

Answer: $8.40 (=$10 - 20% of $10 - 15% of $10)

Explanation: The outsourcing option reduces setup costs by 20% and design changes by 15%, resulting in a per-unit cost of $8.40.

Last-Minute Cram Sheet

• Break-Even Point (units) = Fixed Costs / Contribution Margin per Unit.
• EVA = NOPAT? (Capital Invested × WACC).
• ABC assigns costs to products or services based on their actual consumption of resources.
• Variable Costing ignores fixed costs to evaluate segment performance.
• Residual Income measures the profit earned by a segment after charging for the opportunity cost of capital.
• ROI can be misleading without considering residual income or EVA.
• Make-or-Buy Decision Matrix evaluates the pros and cons of producing in-house versus outsourcing.
• TCO considers all costs associated with a product or service.
• Value Chain Analysis examines the activities that create value for customers.
• Fixed costs are only fixed in the short run within a relevant range – outside that range, they can change.