Prima Company produces different types of flour. They are sold in 5-kg bags. Management of the company monitors the time to pack a bag using the mean and range charts. The time taken to pack eight samples with observations of 20 in each sample were recorded. The following means and ranges (in minutes) are tabulated as follows:

Conclude whether the process is under control. You should use control charts to support your answer. The expected demand for a Samsung 55-inch television set for the next 5 months are: 1100, 960, 620, 840, and 1200. Each worker can produce 20 units of the television set each month at the production plant. Apply the chase and level strategies to develop two aggregate production plans to meet the expected demand. In your answer, you should show how each plan affects the workforce size for each month. Comment on the differences

\begin{tabular}{|c|c|c|} \hline Sample No. & Mean & Range \\ \hline 1 & 4.05 & 0.38 \\ \hline 2 & 4.13 & 0.40 \\ \hline 3 & 4.11 & 0.41 \\ \hline 4 & 4.08 & 0.50 \\ \hline 5 & 4.09 & 0.47 \\ \hline 6 & 4.15 & 0.42 \\ \hline 7 & 4.12 & 0.39 \\ \hline 8 & 4.10 & 0.44 \\ \hline \end{tabular}