Question: Find the upper and lower specification limits using the tolerances of the extruder a.Upper Specification Limit, USL = 400 + 10 = b.Lower Specification Limit,

Find the upper and lower specification limits using the tolerances of the extruder

a.Upper Specification Limit, USL = 400 + 10 =

b.Lower Specification Limit, LSL = 400 10 =

2.What about the process? What do we know?

a.Normal distribution, Mean of 400, Std Dev of 4 thou

b.What is the probability that the rubber thickness will lie within the specification limits when the production output is as specified? (use Excel)

a.=NORMDIST(USL,400,4,1)-NORMDIST(LSL,400,4,1)

3.How many defective tires per hour are produced in the current process, knowing you are producing 10,000 tires per hour?

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