SohnCo Aerospace makes apart from Inconel metal for use in high-temperature applications.

INSTRUCTIONS TO CANDIDATES

ANSWER ALL QUESTIONS

1. SohnCo Aerospace makes apart from Inconel metal for use in high-temperature applications.  The part in question has a target dimension of 2.500 +/- .005 inches.  SohoCo has collected some data on their process and asked you to evaluate this process.  Evaluate these data and determine the next steps.

2.  Valles Global Industries operates a production process that appears to have a constant .06% nonconforming output.  Every two hours, a random sample of 100 items is taken and measured.  If two or more nonconforming items are found, all facility employees are required to watch a 20-minute video on the importance of doing work to specification.  Following that reeducation effort, this process is reset and restarted.  What is the probability that two or more nonconforming items will be found in a random sample? 

 

3.  Your reputation at SohnCo has gone international and people are calling you to consult on their production issues.  SohnCo Baby Products Division makes a part for their line of university loyalty cribs.   This part has a university logo laser engraved.  The specification is 2.500 +/- .005 inch.  Recently, they have been having trouble with the Goldie Gopher logo on University of Minnesota cribs. They have taken 25 data samples of n=9 points every hour and asked you to analyze their data.  The plant manager waves an average calculation at you and rants about interfering consultant from out of town.  It is commonly known that an expert is any random person with a briefcase and laptop more than fifty miles from home. Now what??—discuss your plan.

4.  Jiang Sports America has become legendary for their line of Bluetooth-enabled running shoes.  Recently, they set up a sampling inspection line for their shoes.  They created a sizing device that checks whether a running shoe is the correct length for the size.  It’s a go/no go type device.  In the attached file, you will find the results of 50 samples of size n=100 (they measure one shoe per pair).  Apparently, many shoes are defective.  You recommend measurement of shoes and the sample data shown below.  Discuss your findings.  Make a recommendation.

Attachments:

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