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, based on the R chart, it appears that the process is out of control.

Question

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, based on the R chart, it appears that the process is out of control.

Quizplus · Accepted Answer

The R chart shows that all the values are within the control limits and there are no points beyond the upper or lower control limits, indicating that the process is in control for the range of weights. However, it is not possible to determine if the process is in control for the average weight from the given data.

TABLE 17-9 The Manufacturer of Canned Food Constructed Control Charts and Analyzed