Statistical Process Control Homework

# Statistical Process Control Homework - following number of...

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Statistical Process Control - Homework 1. In your own words (NOT FROM THE BOOK), describe Statistical Process Control. What is the purpose? Provide an example in your daily life where you could use this? What are the key inputs? 2. A quality analyst wants to construct a sample mean chart for controlling a packaging process. Each day last week, he randomly selected four packages and weighed each. The data from that activity appears below. a. What control charts would you use? Why? b. Create the appropriate control charts and attach. c. Is the process in control? How did you determine this? Weight Day Package 1 Package 2 Package 3 Package 4 Monday 23 22 23 24 Tuesday 23 21 19 21 Wednesday 20 19 20 21 Thursday 18 19 20 19 Friday 18 20 22 20 3. A small, independent amusement park collects data on the number of cars with out-of-state license plates. The sample size is fixed at n=25 each day. Data from the previous 10 days indicate the

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Unformatted text preview: following number of out-of-state license plates: a. What control charts would you use? Why? b. Create the appropriate control charts and attach. c. Is the process in control? How did you determine this? Day Out-of-state Plates 1 6 2 4 3 5 4 7 5 8 6 3 7 4 8 5 9 3 10 2 4. Cartons of Plaster of Paris are supposed to weigh exactly 32 oz. Inspectors want to develop process control charts. They take ten samples of six boxes each and weigh them. a. What control charts would you use? Why? b. Based on the following data, compute the lower and upper control limits and determine whether the process is in control. Sample Mean Range 1 33.8 1.1 2 34.6 0.3 3 34.7 0.4 4 34.1 0.7 5 34.2 0.3 6 34.3 0.4 7 33.9 0.5 8 34.1 0.8 9 34.2 0.4 10 34.4 0.3...
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Statistical Process Control Homework - following number of...

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