Project management problem

Table Q4 Activity Predecessor Duration (days) Normal Cost () Crash Cost () Partial Crashing allowed? Normal Crashed 300 Yes 300 250 100 400 2 2 Yes Yes B,C C,D E.F 2 3 100 600 300 300 900 150 275 700 4 9 8 Yes a) Using the Activity on Node (AON) representation, draw the network diagram for the above project, calculate the float for each activity, identify the different paths and determine the project's duration. (20%) b) It is being considered whether an "all-crash" mode should be pursued (I.e. extra cash to cover such a scenario is 1,300. Advise on whether this is feasible, calculating the relevant costs and justifying your approach, and list (no need to discuss the potential practical implications to be considered when crashing a project. (50%) c) The project team performed a risk assessment and identified 5 hazards. The team have judged that hazard A has a low likelihood of occurrence, while hazards B, C, D and E have a medium likelihood of occurrence. The impact on the project is judged to be high for hazards D and E, medium for hazards A and B, and low for hazard C. Using a "1-3-9 scale to assess the likelihood and impact of hazardous factors (i.e. "low", "medium" and "high" respectively'), calculate the risk index for the project. If the total project risk criteria are set at 50 for insignificant risk and 100 for intolerable risk, explain what action you would recommend that the project manager should take. (30%)