Question
A shirt manufacturer buys cloth by the 100 yard roll from a supplier. For setting up...
A shirt manufacturer buys cloth by the 100 yard roll from a supplier. For setting up a control chart to manage the irregularities (e.g., loose threads and tears) the following data was collected from a sample provided by the supplier.
| SAMPLE | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| IRREGULARITIES | 1 | 4 | 1 | 4 | 3 | 2 | 3 | 5 | 6 | 4 |
a. Determine the c¯c¯ , Sp,
UCL and LCL for a c -chart with z= 2.
(Leave no cells blank - be certain to enter "0" wherever
required. Round your answers to 2 decimal places.)
| c−c− | |
| Sp | |
| UCL | |
| LCL | |
b. Suppose the next five rolls from the supplier had four, four, four, three, and five irregularities. Is the supplier process under control?
-
Yes
-
No
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