The Specification for a Plastic Liner for Concrete Highway Projects

question 117

Essay

The specification for a plastic liner for concrete highway projects calls for a thickness of 6.0 mm ± 0.1 mm. The standard deviation of the process is estimated to be 0.02 mm. What are the upper and lower specification limits for this product? The process is known to operate at a mean thickness of 6.03 mm. What is the C_p and C_pk for this process? About what percent of all units of this liner will meet specifications?

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