P
ProHub
English 简体中文 繁體中文
Medium Profitability Operations Production Management

TBell Mining

#Energy #Materials & Extraction

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 case tests the candidate's ability to identify operational inefficiencies through data analysis, specifically a mismatch between actual production composition and technical specifications. The key insight involves recognizing that fine particles are being excluded from the finished product during screening when the technical datasheet allows up to 25% fines, revealing a process optimization opportunity that increases both output and profitability while reducing waste inventory.

Estimated Time 26 minutes
Difficulty Medium
Source IESE
19 / 100
Everything that is not cultivated or fished has its origin in a mine. Your client is a mining company that extracts rocks from an open pit in the mountains. The company is experiencing difficulties in optimizing its production process. On the one hand, their facilities are at top capacity working 3 shifts per day working at almost 100% capacity utilization. On the other hand, the finer products are piling up (more than 500 000 t) since the mine necessarily produces fine particles in the milling process. The client wants your consulting team to help them identify and evaluate the best solutions to optimize their production process and increase their output while driving profits up.

Clarifying Information

  1. The mining company has been operating for several years and has a well-established production process
  2. The production process consists of several stages, including drilling, blasting, crushing and screening. Once the mountain is blasted, they mineral is crushed into smaller pieces and then classified into the different products
  3. A product is considered a range of grain sizes. For example, 8-17 mm (rocks from 8 to 17 mm), 50-150 mm, etc. Every product must comply with a technical datasheet (TDS) that stablish thresholds for the different grain sizes. If not met, TBell faces a penalty from the client.
Mock Interview
Interviewer

Everything that is not cultivated or fished has its origin in a mine. Your client is a mining company that extracts rocks from an open pit in the mountains. The company is experiencing difficulties in optimizing its production process. On the one hand, their facilities are at top capacity working 3 shifts per day working at almost 100% capacity utilization. On the other hand, the finer products are piling up (more than 500 000 t) since the mine necessarily produces fine particles in the milling process. The client wants your consulting team to help them identify and evaluate the best solutions to optimize their production process and increase their output while driving profits up.

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
Practicing...
Score coming soon
Practice this case with AI Mock Interview

TBell Mining faces capacity constraints and inventory buildup of fine particles. The root cause is screening specifications that unnecessarily exclude fine materials from the finished product, despite technical datasheets permitting up to 25% fine content. By adjusting screening processes to include more allowable fines, the company can increase production volume, reduce excess inventory, and significantly boost profits.

Key Insights:

  1. Root cause analysis revealed the problem is not insufficient capacity but misalignment between production process and product specifications
  2. Quick wins often come from identifying gaps between what is produced and what specifications allow
  3. The solution provides dual benefits: increased output and reduced excess inventory stockpile
  4. Implementation requires quality control systems to ensure production consistently meets datasheet requirements

Practice More Case Interview Questions

Browse 835+ real consulting case interview examples from top firms. Filter by difficulty, company, industry, or case type. Or try our AI mock interview for instant feedback and scoring.

Browse All Cases How to Practice Case Interviews