A process produces rubber belts in lots of size 2,500. Inspection records on the last 20 lots

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A process produces rubber belts in lots of size 2,500. Inspection records on the last 20 lots reveal the data in Table 6E.5.

a. Compute trial control limits for a fraction nonconforming control chart.
b. If you wanted to set up a control chart for controlling future production, how would you use these data to obtain the center line and control limits for the chart?

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Managing Controlling and Improving Quality

ISBN: 978-0471697916

1st edition

Authors: Douglas C. Montgomery, Cheryl L. Jennings, Michele E. Pfund

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Question Posted: Sep 19, 2015 04:43 AM

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A process produces rubber belts in lots of size 2,500. Inspection records on the last 20 lots

Question:

Lot Number of Lot Number of 230 435 221 346 230 327 285 311 342 308 12 13 14 15 16 17 18 19 20 456 394 285 331 198 414 131 269 221 407 10

Step by Step Answer:

a MTBStatControl ChartsAttributes ChartsP Test Results for P Chart of Belt Inspection TEST 1 One ...View the full answer

Managing Controlling and Improving Quality

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