Answer Happy

Question 4
You have been appointed to the position of Project Manager for
the development of a Surface Mine. From the given data complete the
following:
a) Draw the Work Breakdown Structure of the Mine project
resulting from the tasks listed in the given table (5 marks)
b) Formulate a Gantt chart or a network diagram for the surface
mine construction tasks. (5 marks)
c) Determine the slack time for each task. (2 marks)
d) Determine the earliest and latest start time for each task.
(2 marks)
e) Indicate the critical path and expected duration of the
construction project (2 marks)
f) Describe the impact on the critical path and project duration
if the truck erections must use the same pad and crane as the
shovel erection. (2 marks)
g) Describe the impact on the critical path and project duration
if the connecting rail line cannot be started until site
preparation is completed and the rail loop cannot be started until
site preparation and the connecting rail line are completed. (2
marks)
Surface Mine Construction Task durations in months Task Description A Access Road B Site Preparation с Main Power Feed Line D Main Substation E Substation A F Substation B G Pit Powerlines H Power Test 1 Water Tank and Lines J Sewage Plant and Lines K Crushing and Blending Plant L Connecting Rail Line M Mine Rail Loop N Mine Haul Road 0 Temporary Office P Shovel Erection Q Truck Erections RWaste Removal S Changehouse T Shops U Offices V Production Equipment Erections W Production Start-up Precedents Duration None 3 ΑΙ 8 B 21 B 3 DI 2 ΕΙ 2 CI 2 F, GO 1 B 2 ВІ 2 B 9 None 6 ВІ 5 B 3 B 1 ВІ 5 B 4 H, N, O, P, QI 6 B 4 B 6 B B 3 I, J, K, L, M, R, S, T, V 2