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Medium Profitability Expansion Decision Operations

Digging For Gold

#Energy

Practice this intermediate profitability case interview question in the Energy sector. Includes detailed problem prompt, clarifying questions, structured framework, and expert recommendation. Part of ProHub's 835+ consulting case library.

ProHub Comment

This is a classic commodity pricing case requiring candidates to understand supply curve dynamics and payback analysis. The key insight is recognizing that in commodity markets, price is set by the marginal cost of the last unit demanded, and adding 100 tons of supply shifts the entire demand curve downward, requiring quantitative modeling to assess profitability despite price compression.

Estimated Time 26 minutes
Difficulty Medium
Source Darden
10 / 100
Our client is an Australian mining company, whose main product is Gold, which it sells exclusively to China. This company is the largest producer in volume in the Chinese market with 200 tons sold each year. It is also the lowest cost producer at $1000 per ounce of production costs. We estimate the total Chinese demand for Gold today to be around 1500 tons per year. Our client has won a concession to mine a new site adjacent to its biggest mine, and increases production to 300 tons per year (i.e. 100 additional tons per year). Is this worth doing?

Clarifying Information

  1. Are there are any company criteria to approve projects? What typically constitutes success? Board typically approves projects with payback in less than 5 years. You can use payback with no discounting for your math
  2. Geography related question… Mine is adjacent to the original mine
  3. How is the market expected to grow? Consider that the market will remain flat at 1500 tons per year for the foreseeable future
  4. How much upfront investment will be required for this project? Prompt to wait until we dive into case ($750M)
  5. What is the cost of this new volume of production? Are there cost synergies or is this a more expensive mine? Prompt to wait until we dive into case (same, $1000/oz)
  6. How does the competitive landscape look like? You can choose to give Exhibit A, but may throw them off receiving before framework
Mock Interview
Interviewer

Our client is an Australian mining company, whose main product is Gold, which it sells exclusively to China. This company is the largest producer in volume in the Chinese market with 200 tons sold each year. It is also the lowest cost producer at $1000 per ounce of production costs. We estimate the total Chinese demand for Gold today to be around 1500 tons per year. Our client has won a concession to mine a new site adjacent to its biggest mine, and increases production to 300 tons per year (i.e. 100 additional tons per year). Is this worth doing?

You

Thanks. Before analyzing, I'd like to clarify a few key questions...

Interviewer

Good question. Let me provide some background information...

You

Based on this, I suggest analyzing from these dimensions...

AI Score
Structure Analysis Communication Business Sense Quantitative
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Practice this case with AI Mock Interview

An Australian gold mining company must decide whether to expand production by 100 tons per year (33% increase from 200 to 300 tons) adjacent to their existing mine. The analysis requires understanding how increased supply affects commodity pricing, calculating the payback period of a $750M investment, and assessing competitive responses.

Key Insights:

  1. In commodity markets, price is determined by the cost of the marginal (last) unit demanded—adding 100 tons pushes price down from $1,200/oz to $1,150/oz, creating a $50/oz margin compression
  2. Despite lower unit margin ($150 vs $200 profit/oz), increased volume (300 vs 200 tons) yields higher absolute profit ($1.35B vs $1.2B annually), generating $150M incremental profit and achieving the board’s 5-year payback requirement
  3. Competitive dynamics favor expansion because Competitor B would need to expand by 150M tons (75% capacity increase) before prices drop further, making the client’s competitive position defensible

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