**Session_8_Homework_Problems_2**

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Session 8 Homework Problems #2

- The following data are the production units from a manufacturing line for the past 5 weeks. The manager wants to know if the process is stable and in control. Produce X-bar and R charts and comment on the process

Week |
Monday |
Tuesday |
Wednesday |
Thursday |
Friday |

1 |
12 |
15 |
8 |
7 |
10 |

2 |
6 |
9 |
11 |
13 |
7 |

3 |
15 |
11 |
9 |
6 |
12 |

4 |
8 |
7 |
6 |
11 |
14 |

5 |
20 |
12 |
10 |
5 |
14 |

6 |
13 |
10 |
9 |
8 |
12 |

7 |
10 |
14 |
11 |
8 |
5 |

8 |
10 |
15 |
17 |
11 |
9 |

- The internal diameter of a cylinder must be 60 centimeter. The tolerance is +1 and 0.5 centimeter. If the mean value of the process is 60.4,

- Calculate the process capability index and indicate if the process is capable.
- Calculate the % of the cylinders produced that will meet the specifications
- What should be the standard deviation in order for the process to be capable

- A product has specification limits of 18 to 20. If the process mean is 19.2 and the standard deviation is 0.6, calculate
- the process capability for this production line.
- What % of the products are out of specs

**Category:**Accounting, General Accounting

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