The specifications for a manifold gasket that installs between two engine parts calls for a thickness of 2.500 mm ± .020 mm. The standard deviation of the process is estimated to be 0.004 mm
The process is currently operating at a mean thickness of 2.50 mm. (a) What are the upper and lower specification limits for this product? (b) What is the Cp for this process? (c) About what percent of all units of this gasket will meet specifications? Does this meet the technical definition of Six Sigma?
(a) LSL = 2.48 mm, USL = 2.52 mm. (b) Cp = (2.52 - 2.48 )/(6 ? 0.004 ) = 1.67. (b) Each specification limit lies 5 standard deviations from the centerline, so practically 100 percent of units will meet specifications. However, this percentage is not quite as high as Six Sigma would call for.
You might also like to view...
A single-phase waiting-line system meets the assumptions of constant service time or M/D/1. Units arrive at this system every 12 minutes on average. Service takes a constant 8 minutes. What is the average length of the queue Lq in units?
A) 0.67 B) 2.5 C) 4.5 D) 5.0 E) 7.5
________ is a set of priority planning techniques for planning component items below the ________
A) Master production scheduling; the market plan B) Material requirements planning; end item level C) Production planning; end item level D) all of the above E) none of the above