Office Automation, Inc. has developed a proposal for introducing a new computerized office system that will improve word processing and interoffice communications for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office-system project. Information about the activities is shown below where times are in weeks and costs are in thousands of dollars. NOTE: The crashing cost given in the last (seventh) column of the table below is the total cost to finish an activity by its minimum time given in the fifth column.

(b) Assume the company wants to complete the project in 26 weeks. What crashing decisions would you recommend for meeting the completion date at the least possible cost? What is the added project cost to meet the 26-week completion time? Provide reasoning as to how all crashing decisions were made.

(c) What are your final recommendations?

\begin{tabular}{|c|c|c|c|c|c|c|c|c|} 10 & & & & & & & \\ \cline { 2 - 9 } & Actvity & Normal Time & Early Start & Early Finish & Late Start & Late Finish & Slack & Critical \\ \cline { 2 - 8 } 12 & A & 10 & 0 & 10 & 0 & 10 & 0 & YES \\ \hline 13 & B & 8 & 10 & 18 & 10 & 18 & 0 & YES \\ \hline 14 & C & 10 & 18 & 28 & 18 & 28 & 0 & YES \\ \hline 15 & D & 7 & 10 & 17 & 11 & 18 & 1 & NO \\ \hline 16 & E & 10 & 17 & 27 & 18 & 28 & 1 & NO \\ \hline 17 & F & 3 & 28 & 31 & 28 & 31 & 0 & YES \\ \hline \end{tabular} 19