A continuous miner on a Canadian underground mine site frequently experiences failures of its hydraulic hoses, often at seemingly random locations. Applying Root Cause Analysis, which of the following 'Why' statements concerning 'Why do the hoses fail?' aligns best with leading towards a systemic root cause rather than a symptom?

Question: A continuous miner on a Canadian underground mine site frequently experiences failures of its hydraulic hoses, often at seemingly random locations. Applying Root Cause Analysis, which of the following 'Why' statements concerning 'Why do the hoses fail?' aligns best with leading towards a systemic root cause rather than a symptom?

Answer options:

• Because the hose material is not robust enough for the application. ✅ Because the hoses are subject to abrasion from adjacent structures.
• Because the operator frequently overtightens the steering wheel.
• Because the maintenance team is not installing the hoses correctly.

Correct answer: Because the hoses are subject to abrasion from adjacent structures.

Explanation: Identifying abrasion from adjacent structures as the reason for failure (Why do the hoses fail?) points towards a design or installation issue (systemic) rather than just component quality (material, which is an initial 'Why' but not deep enough) or incorrect installation by technicians (another 'Why'). It identifies an external wear mechanism that can be designed out or protected against.