The Schuman Company is considering the construction of a ski lodge and ski complex. The board of directors has voted to build a 10 million dollar complex. Stage one of the complex will be constructed in year 1 and will include the construction of a day lodge, chair lift, rope tow, generator house (for electricity) and a parking lot designed to accommodate 400 cars and 30 busses. Stage one will begin no later than April 1 and should be completed by October 1 in time for the next ski season. You have been assigned as project manager. You and your team has researched the tasks and durations and have determined the following time estimates. Materials for the chair lift and rope tow will take 30 days and 12 days respectively to arrive once the order has been submitted. Lumber for the day lodge, generator hut, and foundations will take 9 days to arrive. The electrical and plumbing materials for the lodge will take 12 days to arrive. The generator will take 12 days to arrive. Be for actual construction can begin, a road to the site must be build which will take 6 days. As soon as the road is in, clearing can begin concurrently on the sites of the day lodge, generator house, chair lift and rope tow. It is estimated that the clearing task at each site will take 6 days, 3 days, 36 days and 6 days respectively. The clearing of the main ski slopes can begin after the area for the chair lift has been cleared and will take 84 days. The foundations for the day lodge will take 12 days and construction of the main framework will take an additional 18 days. After the framework is completed, electrical wiring and plumbing can be installed concurrently. These should take 24 and 30 days, respectively. Finally, the finishing construction on the day lodge can begin; this will take 36 days. Installation of the chair lift towers (67 days) can begin once the site is cleared, lumber delivered, and the foundation completed (6 days). Also, when the chair lift site has been cleared, construction of a permanent road to the upper towers can be started; this will take 24 days. While the towers are being installed, the electric motor to drive the chair lift can be installed; the motor can be installed in 24 days. Once the towers are completed and the motor installed, it will take 3 days to install the cable and an additional 12 days to install the chairs. Installation of the towers for the rope tow can begin once the site is cleared and the foundation is build and poured; it takes 4 days to build the foundation, pour the concrete and let it cure, and 20 days to install the towers for the rope tow. While the towers are being erected, installation of the electric motor to drive the rope tow can begin; this activity will take 24 days. After the towers and motor are installed, the rope tow can be strung in 1 day. The parking lot can be cleared once the rope tow in finished; this task will take 18 days. The foundation for the generator house can begin at the same time as the foundation for the lodge; this will take 6 days. The main framework for the generator house can begin once the foundation is completed; framing will take 12 days. After the house if framed, the diesel generator can be installed in 18 days. Finishing the construction on the generator house can now begin and will take 12 more days.
a. Draw the network diagram
b. Determine the project length
c. Determine the EST, LST, EFT, LFT for the project tasks
d. Determine the critical path and the slack for each task.
e. Can the project be completed by Oct 1? Explain.