The table below contains information about an environmental clean-up project in the township of Hiles. Shorten the project

three

weeks by finding the minimum-cost schedule. Assume that project indirect costs and penalty costs are negligible. Identify activities to crash while minimizing the additional crash costs.

Fill in the table below with the activity times after crashing to show the resulting schedule. (Enter your responses as whole numbers.)

The cost of shortening the project is $ _______

\begin{tabular}{ccccc} \hline Activity & Normal Time (weeks) & Crash Time (weeks) & Cost to Crash (\$ per week) & Immediate Predecessor(s) \\ \hline A & 5 & 4 & 250 & None \\ B & 10 & 9 & 200 & None \\ C & 8 & 7 & 270 & A \\ D & 7 & 4 & 350 & A \\ E & 3 & 3 & & B \\ F & 1 & 1 & & C, D \\ G & 5 & 3 & 250 & D, E \\ H & 8 & 7 & 450 & F \\ I & 1 & 1 & & G \\ \hline \end{tabular} \begin{tabular}{cc|cc} \hline Activity & Time according to schedule (weeks) & Activity & Time according to schedule (weeks) \\ \hline A & & F & \\ B & & G & \\ C & & H & \\ D & & & \\ E & & & \\ \hline \end{tabular}