Explain the differences between activity on node and activity on arrow project network diagrams and discuss why they are of use to project managers.

(6 Marks)

Table 1 overleaf shows information about a project.

Use it to construct a project network diagram.

(6 Marks)

On the diagram show the critical path and state its duration in weeks.

(3 Marks)

For each task calculate the float.

(10 Marks)

\begin{tabular}{|l|l|l|l|} \hline ID & Task & Duration (weeks) & Predecessor/s \\ \hline 1 & Site Levelling & 1w & \\ \hline 2 & Foundations & 2w & 1 \\ \hline 3 & Classrooms & 6w & 2 \\ \hline 4 & Offices & 2w & 3 \\ \hline 5 & Drainage & 2w & 2 \\ \hline 6 & Storage rooms & 3w & 5 \\ \hline 7 & Kitchen & 1w & 5 \\ \hline 8 & Advanced Electrical Services & 2w & 4,6,7 \\ \hline 9 & Decorating & 1w & 8 \\ \hline 10 & Perimeter fencing & 4w & 1 \\ \hline 11 & Project completion & 0d & 9,10 \\ \hline \end{tabular}