Table 2.1 summarises eight (8) activities and related time and cost information for road resurfacing project....

  

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Table 2.1 summarises eight (8) activities and related time and cost information for road resurfacing project. Activity A can start anytime since it has no predecessor. Activities B and C can start when activity A is completed. Activities D and E can proceed after activity B is finished. Activities E and D are predecessors for activity G. Activity F proceeds after completion of activity C. Activity H cannot proceed until activity F is completed. Table 2.1: Activities and related information for project Activity Time (đays) *Total Cost (RM) Normal Crash Normal Crash A 4 500 800 4 2 600 1800 3 700 r100 10 9. 500 600 3 1000 2500 F 7 4 900 3900 5 4. 500 1200 H 3 1250 1750 *Total cost given is for the whole activity duration Construct a network diagram and estimate the expected normal completion time for the above road resurfacing project. Determine the total cost at this completion time. a) 69 b) The local authority has instructed the contractor to shorten the completion time by two days to reduce traffic congestion. Determine which activities should be crashed and what are the new project completion time and the additional project cost. Provide the revised project network with numerical proof. (6 marks) Due to poor weather condition, the locar authority is in doubt about the suggested new completion time in Question 2(b). If the total variance for critical path (after crashing) is 2.5 days, determine the revised project completion time with 95% probability. (4 marks) d) Select any activity from the above project having slack time and explain its meaning. (2 marks) Table 2.1 summarises eight (8) activities and related time and cost information for road resurfacing project. Activity A can start anytime since it has no predecessor. Activities B and C can start when activity A is completed. Activities D and E can proceed after activity B is finished. Activities E and D are predecessors for activity G. Activity F proceeds after completion of activity C. Activity H cannot proceed until activity F is completed. Table 2.1: Activities and related information for project Activity Time (đays) *Total Cost (RM) Normal Crash Normal Crash A 4 500 800 4 2 600 1800 3 700 r100 10 9. 500 600 3 1000 2500 F 7 4 900 3900 5 4. 500 1200 H 3 1250 1750 *Total cost given is for the whole activity duration Construct a network diagram and estimate the expected normal completion time for the above road resurfacing project. Determine the total cost at this completion time. a) 69 b) The local authority has instructed the contractor to shorten the completion time by two days to reduce traffic congestion. Determine which activities should be crashed and what are the new project completion time and the additional project cost. Provide the revised project network with numerical proof. (6 marks) Due to poor weather condition, the locar authority is in doubt about the suggested new completion time in Question 2(b). If the total variance for critical path (after crashing) is 2.5 days, determine the revised project completion time with 95% probability. (4 marks) d) Select any activity from the above project having slack time and explain its meaning. (2 marks)

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