A Company Must Perform a Maintenance Project Consisting of Seven

question 88

Multiple Choice

A company must perform a maintenance project consisting of seven activities.The activities,their predecessors and their respective time estimates are presented below: $\begin{array}{|l|l|l|l|}\hline & & \text { Immediate } & \\\hline \text { Activity } & \text { Designation } & \text { Predecessor } & \text { Time in Days } \\\hline \text { Break down both machines } & \text { A } & \text { None } & 3 \\\hline \text { Clean machine 1 } & \text { B } & \text { A } & 3 \\\hline \text { Clean machine 2 } & \text { C } & \text { A } & 3 \\\hline \text { Re-set machine 1 } & \text { D } & \text { B } & 4 \\\hline \text { Re-set machine 2 } & \text { E } & \text { C } & 2 \\\hline \text { Re-calibrate both machines } & \text { F } & \text { D and E } & 1 \\\hline \text { Final test } & \text { G } & \text { F } & 1 \\\hline\end{array}$
Using the Single Time Estimate CPM procedure,which activities have slack in this project?

• A)A,B,C
• B)B,D
• C)Only C
• D)C,E
• E)F,G

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