Exam 17: Statistical Applications in Quality Management

TABLE 17-9 The manufacturer of canned food constructed control charts and analyzed several quality characteristics. One characteristic of interest is the weight of the filled cans. The lower specification limit for weight is 2.95 pounds. The table below provides the range and mean of the weights of five cans tested every fifteen minutes during a day's production. -Referring to Table 17-9, construct an chart for the weight.

The p chart is a control chart used for monitoring the proportion of items that meet given specifications.

TABLE 17-1 A local newspaper has 10 delivery boys who each deliver the morning paper to 50 customers every day. The owner decides to record the number of papers delivered on time for a 10-day period for one of the delivery boys and construct a p chart to see whether the percentage is too erratic. -Referring to Table 17-1, what is the numerical value of the center line for the p chart?

The Cpk is a one-sided specification limit.

TABLE 17-10 Below is the number of defective items from a production line over twenty consecutive morning shifts. -Referring to Table 17-10, a c chart is to be constructed for the number of defective items. The lower control limits is ________.

Which of the following is a method for breaking process into a series of steps in order to eliminate defects and produce near perfect results?

One of the morals of the red bead experiment is that variation is part of any process.

Referring to Table 17-4, what is the value of the Cp index?

One of the morals of the red bead experiment is

TABLE 17-2 A political pollster randomly selects a sample of 100 voters each day for 8 successive days and asks how many will vote for the incumbent. The pollster wishes to construct a p chart to see if the percentage favoring the incumbent candidate is too erratic. -Referring to Table 17-2, which expression best characterizes the p chart?

TABLE 17-7 A supplier of silicone sheets for producers of computer chips wants to evaluate her manufacturing process. She takes samples of size 5 from each day's output and counts the number of blemishes on each silicone sheet. The results from 20 days of such evaluations are presented below. -Referring to Table 17-7, an R chart is to be constructed for the number of blemishes. The lower control limit for this data set is ________.

TABLE 17-10 Below is the number of defective items from a production line over twenty consecutive morning shifts. -Referring to Table 17-10, based on the c chart, it appears that the process is out of control.

Changes in the system to reduce common cause variation are the responsibility of management.

Referring to Table 17-3, suppose the analyst constructs an chart to see if the production process is in-control. What is the lower control limit (LCL) for this chart?

The cause of variation that can be reduced only by changing the system is ________ cause variation.

TABLE 17-3 A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day. -Referring to Table 17-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. What is the center line of this R chart?

Common causes of variation represent variation due to the inherent variability in the system.

Variation due to the inherent variability in a system of operation is called

The R chart is a control chart used to monitor a process mean.

TABLE 17-1 A local newspaper has 10 delivery boys who each deliver the morning paper to 50 customers every day. The owner decides to record the number of papers delivered on time for a 10-day period for one of the delivery boys and construct a p chart to see whether the percentage is too erratic. -Referring to Table 17-1, which expression best characterizes the p chart?