The Heinz frozen food corporation in Ontario Oregon was sele

The Heinz frozen food corporation in Ontario, Oregon was selected to produce a new bag for Ore-Ida frozen fries. When the bags were first produced there were problems with the consistency. It was unclear whether the problem was the machinery or the \"film\" (the material used in the bags). One of the key measurements was the distance from the UPC (universal product code) and a black mark on the bag. A number of rolls of film were selected and this measurement was recorded. The following is an X bar control chart for this measurement. Based on the X bar chart, write a short sentence that summarizes what this chart indicates about the consistency of the measurement on the film.

Solution

The control chart is a graph used to study how a process changes over time. Data are plotted in time order. A control chart always has a central line for the average, an upper line for the upper control limit and a lower line for the lower control limit. These lines are determined from historical data. By comparing current data to these lines, you can draw conclusions about whether the process variation is consistent (in control) or is unpredictable (out of control, affected by special causes of variation).

Control charts for variable data are used in pairs. The top chart monitors the average, or the centering of the distribution of data from the process. The bottom chart monitors the range, or the width of the distribution. If your data were shots in target practice, the average is where the shots are clustering, and the range is how tightly they are clustered. Control charts for attribute data are used singly.

behavior IS NOT consistentover the time or unstable

that is measurement on the film is not consistent

as the data points lie above the control line(upper control line and lower control line.

the process is out of control