Problem $9-24($Algorithmic$)$

Office Automation, Inc., developed a proposal for introducing a new computerized office system that will standardize the electronic archiving of invoices for a particular company. Contained in the proposal is a list of activities that must be accomplished to complete the new office system project. Use the following relevant information about the activities:

Immediate Time $($weeks$)$ Cost $($$$1000$s$)$

Activity Description Predecessor$($s$)$ Normal Crash Normal Crash

A Plan needs $983050$

B Order equipment A $86120150$

C Install equipment B $107100160$

D Set up training lab A $764050$

E Conduct training course D $1085075$

F Test system C$,$ E $3360$

Which project network is correct?

$($i$)($ii$)$

$($iii$)($iv$)$

Develop an activity schedule. If your answer is zero, enter $0.$

Earliest Latest Earliest Latest Critical

Activity Start Start Finish Finish Slack Activity

A fill in the blank $2$

fill in the blank $3$

fill in the blank $4$

fill in the blank $5$

fill in the blank $6$

B fill in the blank $8$

fill in the blank $9$

fill in the blank $10$

fill in the blank $11$

fill in the blank $12$

C fill in the blank $14$

fill in the blank $15$

fill in the blank $16$

fill in the blank $17$

fill in the blank $18$

D fill in the blank $20$

fill in the blank $21$

fill in the blank $22$

fill in the blank $23$

fill in the blank $24$

E fill in the blank $26$

fill in the blank $27$

fill in the blank $28$

fill in the blank $29$

fill in the blank $30$

F fill in the blank $32$

fill in the blank $33$

fill in the blank $34$

fill in the blank $35$

fill in the blank $36$

What are the critical activities, and what is the expected project completion time?

Critical Path:

Expected project completion time $=$ fill in the blank $39$

weeks.

Assume that the company wants to complete the project in six months or $26$ weeks. What crashing decisions do you recommend to meet the desired completion time at the least possible cost? Work through the network and attempt to make the crashing decisions by inspection.

Crash Activities Number of Weeks Cost $($$$1000$s$)$

A $1$ fill in the blank $40$

B $2$ fill in the blank $41$

C $1$ fill in the blank $42$

D $1$ fill in the blank $43$

E $1$ fill in the blank $44$

fill in the blank $45$

Develop an activity schedule for the crashed project. If your answer is zero, enter $0.$

Earliest Latest Earliest Latest Critical

Activity Start Start Finish Finish Slack Activity

A fill in the blank $46$

fill in the blank $47$

fill in the blank $48$

fill in the blank $49$

fill in the blank $50$

B fill in the blank $52$

fill in the blank $53$

fill in the blank $54$

fill in the blank $55$

fill in the blank $56$

C fill in the blank $58$

fill in the blank $59$

fill in the blank $60$

fill in the blank $61$

fill in the blank $62$

D fill in the blank $64$

fill in the blank $65$

fill in the blank $66$

fill in the blank $67$

fill in the blank $68$

E fill in the blank $70$

fill in the blank $71$

fill in the blank $72$

fill in the blank $73$

fill in the blank $74$

F fill in the blank $76$

fill in the blank $77$

fill in the blank $78$

fill in the blank $79$

fill in the blank $80$

What added project cost is required to meet the six$-$month completion time?

Total added cost due to crashing $ fill in the blank $82$

$.$