Although engineering has collected data on alternative process costs for building transmissions in the worksheet Transmission Costs, why didn't they reach a conclusion as to whether one of the proposed processes is better than the current process?

Unit Tractor Transmission Costs \begin{tabular}{|r|r|r|} \hline Current & Process A Process B \\ \hline \hline$242.00 & $242.00 & $292.00 \\ \hline$176.00 & $275.00 & $321.00 \\ \hline$286.00 & $199.00 & $314.00 \\ \hline$269.00 & $219.00 & $242.00 \\ \hline$327.00 & $273.00 & $278.00 \\ \hline$264.00 & $265.00 & $300.00 \\ \hline$296.00 & $435.00 & $301.00 \\ \hline$333.00 & $285.00 & $286.00 \\ \hline$242.00 & $384.00 & $315.00 \\ \hline$288.00 & $387.00 & $300.00 \\ \hline$314.00 & $299.00 & $304.00 \\ \hline$302.00 & $145.00 & $300.00 \\ \hline$335.00 & $266.00 & $351.00 \\ \hline$242.00 & $216.00 & $277.00 \\ \hline$281.00 & $331.00 & $284.00 \\ \hline$289.00 & $247.00 & $276.00 \\ \hline$259.00 & $280.00 & $312.00 \\ \hline$322.00 & $267.00 & $273.00 \\ \hline$209.00 & $210.00 & $281.00 \\ \hline$282.00 & $391.00 & $303.00 \\ \hline$304.00 & $297.00 & $306.00 \\ \hline$391.00 & $346.00 & $312.00 \\ \hline$236.00 & $230.00 & $287.00 \\ \hline$383.00 & $332.00 & $306.00 \\ \hline$299.00 & $301.00 & $312.00 \\ \hline$300.00 & $277.00 & $295.00 \\ \hline$278.00 & $336.00 & $288.00 \\ \hline$303.00 & $217.00 & $313.00 \\ \hline$315.00 & $274.00 & $286.00 \\ \hline$321.00 & $339.00 & $338.00 \\ \hline \end{tabular} Unit Tractor Transmission Costs \begin{tabular}{|r|r|r|} \hline Current & Process A Process B \\ \hline \hline$242.00 & $242.00 & $292.00 \\ \hline$176.00 & $275.00 & $321.00 \\ \hline$286.00 & $199.00 & $314.00 \\ \hline$269.00 & $219.00 & $242.00 \\ \hline$327.00 & $273.00 & $278.00 \\ \hline$264.00 & $265.00 & $300.00 \\ \hline$296.00 & $435.00 & $301.00 \\ \hline$333.00 & $285.00 & $286.00 \\ \hline$242.00 & $384.00 & $315.00 \\ \hline$288.00 & $387.00 & $300.00 \\ \hline$314.00 & $299.00 & $304.00 \\ \hline$302.00 & $145.00 & $300.00 \\ \hline$335.00 & $266.00 & $351.00 \\ \hline$242.00 & $216.00 & $277.00 \\ \hline$281.00 & $331.00 & $284.00 \\ \hline$289.00 & $247.00 & $276.00 \\ \hline$259.00 & $280.00 & $312.00 \\ \hline$322.00 & $267.00 & $273.00 \\ \hline$209.00 & $210.00 & $281.00 \\ \hline$282.00 & $391.00 & $303.00 \\ \hline$304.00 & $297.00 & $306.00 \\ \hline$391.00 & $346.00 & $312.00 \\ \hline$236.00 & $230.00 & $287.00 \\ \hline$383.00 & $332.00 & $306.00 \\ \hline$299.00 & $301.00 & $312.00 \\ \hline$300.00 & $277.00 & $295.00 \\ \hline$278.00 & $336.00 & $288.00 \\ \hline$303.00 & $217.00 & $313.00 \\ \hline$315.00 & $274.00 & $286.00 \\ \hline$321.00 & $339.00 & $338.00 \\ \hline \end{tabular}