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The roughness of the ground surface of a component cannot exceed 0.02 units. A random sample of components ground by a surface-grinding machine yielded the following estimates: Mean roughness = 0.01, Standard deviation = 0.003. Compute the Cp index of this process

Skill/Topic: Statistical Process Control
A) 1.111
Explanation: Cp = [USL μ]/ 3σ = [0.02 - 0.01]/[3 * 0.003] = 1.111
Asked by: Interview Candidate | Asked on: Dec 8th, 2005

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